You handle them very special in terms of being extra careful in a very high ventilation area, in hoods is how you handle them.

在使用它们的时候你需要格外小心,必须在通风条件非常好的地方，在通风柜中才行。

麻省理工公开课 - 化学原理课程节选

Every summer an extra area of ice six times the size of California has been disappearing.

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Worst hit will be thousands of one-room bars and restaurants that don't have an extra area to corral customers who wish to smoke, thus forcing them outside.

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Existing ultracapacitors get their extra surface area by using electrodes coated with carbon and etched to produce holes, rather like a sponge.

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