To train a rat, the experimenter placed it in an operant conditioning chamber: a small plastic box with a lever at one end.

为了训练小鼠，实验人员把它放在一个操作性条件反射室：一个一端置有操作杆的塑料箱。

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The timer then opens the lower valve for a fixed period of time, permitting the - plastic powder to discharge from the intermediate chamber.

定时装置随后开启下面的夹管阀并持续一段固定的时间，让塑料粉末从中间罐腔中排出。

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A reciprocating screw moves the plastic along this lengthy heating chamber, where the material is melted to a fluid state.

往复螺杆移动塑料沿着这条漫长的加热室，那里的材料融化到流体状态。

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Insert a foil pack of powdered insulin into a slot, prime the pump with a lever and push a trigger that releases the cloud of insulin into a clear plastic chamber.

FORBES: Magazine Article

The outer layers are made of acrylic plastic and the vacuum chamber in the middle is divided into three or four watertight compartments stacked on top of one another.

ECONOMIST: Cataracts

The pride of completion includes plastic-fashioned laser cannons, escape pods, Darth Vader meditation chamber and a hologram of the evil Emperor.

FORBES: Magazine Article