cover of a set of dependencies

例句：

1. 1. Thebook has a beautiful cover.
   这本书有一个漂亮的封面。
2. 2. The tablecloth is made of silkand has a lovely cover.
   桌布是用丝绸做的，有可爱的封面。
3. 3. The newcar has a sleek cover that makes itlook expensive.
   这款新车有一个光滑的封面，看起来很贵气。