陷阱可以是任何放置在地面上的小容器，其顶部与周围的表面齐平，并装满防腐剂。

A pitfall trap can be any small container placed in the ground with the top level with the surrounding surface and filled with a preservative.

youdao

你希望避免许多小容器。

You want to avoid having too many small containers.

youdao

我们主意用小容器包装这批货。

We advocate using smaller container to pack the goods.

youdao

As carefully as people work with radioactivity here, and using often much, much safer radioactive materials than radium bromide, and using them, and special hoods, and having special procedures, they still do a lot of checking with these Geiger counters to make sure everything's safe.

虽然在这里人们,用放射性物质都非常的小心，而且通常用的材料放射性,都比溴化镭要小得多，并且用的时候,都用特殊的容器,特殊的操作过程,但我们平时仍会用。

麻省理工公开课 - 化学原理课程节选