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 Earth’s surface emits infrared radiation it has absorbed from the sun. Greenhouse gases partly trap that energy as heat, keeping the planet habitable.
地球表面释放出从吸收自太阳的红外辐射，温室气体将这种能量作为热部分地保留下来，使得地球成为可以繁衍生息之地。
Dolphins first trap small fish in large conch shells with their rostrums (beaks). They then bring the shells to the surface and shake them.
海豚先用它们的吻突将小鱼赶到大海螺壳中，然后将螺壳带出水面并晃动。
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