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441.
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A rotary evaporator consists of a round flask in a bath of hot water, and is designed to evaporate solvents. The flask is rotated and the solvent collects under a vacuum onto a condenser and drips into a condensate collecting flask. In this way solutions can be concentrated or purified. By attaching a vacuum pump, the air pressure and therefore the boiling point of the fluid can be decreased.
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i18n: file: data/tools.xml:73
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旋转蒸发仪由圆底烧瓶和热水浴锅组成。将想要蒸发的液体放入圆底烧瓶，旋转蒸发仪带动圆底烧瓶在热水浴中旋转，在真空的条件下，液体中的某些易挥发成分被蒸出，经冷凝后导入集液瓶中。这样溶液就被浓缩或提纯了。连接真空泵之后，大气压下降，于是液体的沸点也随之下降了。
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Translated by
Jonathan Riddell
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Located in
rc.cpp:2531
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442.
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Reflux Condenser
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i18n: file: data/tools.xml:77
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冷凝管
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Translated by
yuanjiayj
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Reviewed by
Feng Chao
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Located in
rc.cpp:2533
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443.
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A reflux condenser subjects fluid to a process where a gas produced by heating is collected on the reflux condenser. The fluid is cooled until it condenses and runs back into the original fluid. Usually it is put on a round-bottomed flask or several neck flasks.
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i18n: file: data/tools.xml:78
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冷凝管具有回流功能，当加热产生的蒸气上升至冷凝管中时，气体凝结下来回流到原液中。通常它连接一个圆底烧瓶或一些长颈瓶。
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Translated by
yuanjiayj
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Reviewed by
Feng Chao
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Located in
rc.cpp:2535
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444.
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Pipette Bulb
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i18n: file: data/tools.xml:82
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吸耳球
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Translated by
yuanjiayj
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Reviewed by
yjjart
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Located in
rc.cpp:2537
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445.
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A pipette bulb is used to fill pipettes. Squeezing then releasing the bulb produces a negative pressure, causing fluid to flow into the pipette; squeezing the bulb then causes the fluid to flow out of the pipette.
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i18n: file: data/tools.xml:83
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吸耳球用于移液管提升液体。它可以产生一个负压以使液体进入移液管。当然它也可以反过来将移液管中的液体压出来。
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Translated by
Jonathan Riddell
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Located in
rc.cpp:2628
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446.
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Test Tube
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i18n: file: data/tools.xml:87
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试管
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Translated by
yuanjiayj
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Reviewed by
yjjart
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Located in
rc.cpp:2541
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447.
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In a test tube small reactions or experiments are performed. There are many different types of tubes. For example some have connectors, some are etched for measurements, some are hardened for durability.
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i18n: file: data/tools.xml:88
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小反应小实验可以在试管中进行。试管有很多种，例如有些具有连接器，有些有刻度，有些为了耐用而造的很硬。
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Translated by
Jonathan Riddell
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Located in
rc.cpp:2543
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448.
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Protective Goggles
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i18n: file: data/tools.xml:92
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护目镜
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Translated by
yuanjiayj
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Reviewed by
yjjart
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Located in
rc.cpp:2545
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449.
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Most laboratories insist that protective goggles are worn. Without them, it is too risky to work with most chemicals. Usually, the lens is a special type of plastic that affords protection from both mechanical impacts, and acid and base chemicals.
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i18n: file: data/tools.xml:93
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绝大多数实验室都要求每人都应戴护目镜，因为身处化学品之间存在危险。通常护目镜的镜片是用特种塑料制成的，既可以防撞击也可防酸碱化学品。
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Translated by
Jonathan Riddell
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Located in
rc.cpp:2547
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450.
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Round-Bottomed Flask
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i18n: file: data/tools.xml:97
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圆底烧瓶
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Translated by
Jonathan Riddell
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Located in
rc.cpp:2549
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