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.
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。
The love and light generated along our surface flows inward as a preservative measure due to all of the nuclear annihilations and radiation that this created.
而作为一个对各种核毁灭及所带来辐射的保护措施，我们的表层所产生的爱和光明则都流向到地心里。
Uses: used as glass etching agent, metal surface of the chemical polishing agent, wine of the disinfectant, preservative, mordant the fiber is also used for extraction of rare elements and so on.
用途：用作玻璃蚀刻剂，金属表面的化学抛光剂、酿酒的消毒剂，防腐剂，纤维的媒染剂，也用于提取稀有元素等。
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