Giving shadows a 3-d feel, or adding a single colour, will help separate them from the rest of the sketch.

加上3 - D的阴影效果，或者增加单独的颜色，将有助于和草图上的其他部分区分。

youdao

You"d better separate the bad apples from the good ones."

你最好把坏苹果同好苹果分开。

youdao

You"d better separate the bad apples from the good ones."

你最好把坏苹果同好苹果分开。

youdao