1. There are spikes on the bottom of shoes used for running.
   跑鞋底部有钉子。
2. Mrs Snell had taken up her position on the bottom step of the stairs.
   斯内尔夫人已经占据了楼梯最底下一个台阶的位置。
3. Die centering in press is obtained by milling a slot on the bottom subplate parallel to the direction of the feed.
   通过在与进料方向平行的底部底板上铣出一个狭槽来实现压床上模具中心的调整。
4. Benthos The organisms that live on the bottom sediments of freshwater and marine ecosystems. They include plants and algae (phytobenthos) that grow below low tide mark.
   底栖生物（海底生物）：在淡水或海洋生态系统底部生活的生物体。包括一些水底的植物和藻类。
5. My wife ended up selecting a white skirt with ruffly things on the bottom and a teal blue top, both of which I liked a lot but was too smart to acknowledge.
   我的妻子终于选了件白色的裙子，裙子底边呈波浪形，上部有一个兰色鸭子的图案，这两点我很喜欢，但我没有表露。

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