as clean as a whistle

• 光滑

as clean as a whistle的用法和样例：

例句

1. The spider has a velvety black body.
   那蜘蛛的黑色身子有如天鹅绒般光滑。
2. She lubricated her hands with a lotion.
   她抹润肤霜使手光滑。