中文定义为最小麻醉挥发剂所需肺泡浓度，在一个大气压，并达到平衡后，能使50％的测试人在外科切皮时不动。

Mac is defined as minimal alveolar concentration of an anesthetic vapour needed to prevent 50% subjects from moving toward standard surgical incision at 1 atmosphere at equilibrium.

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常用防腐剂是乙二醇或丙二醇，因为随着酒精快速挥发，捕集器也随之恢复干燥。

The preservative used is usually ethylene glycol or propylene glycol, as alcohol will evaporate quickly and the traps will dry out.

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它将点燃固体推进燃料(HTPB，或称羟基封端聚丁二烯)和液体氧化剂(高挥发性过氧化物，HTP)的混合物持续20秒。

It will burn a mixture of solid propellant (HTPB, or hydroxyl-terminated polybutadiene) and liquid oxidiser (high-test peroxide, HTP) for 20 seconds.

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