bottom cut

例句：

1. 1. The car was bottom cut to save weight.
   为了减轻重量，这辆车进行了底部切割。
2. 2. The engineer made a bottom cut to the wall for better ventilation.
   工程师在墙上做了底部切割，以便有更好的通风。
3. 3. The bottom cut of the dress is very flattering.
   这条裙子的底部切割非常吸引人。