shadowing
n. 遮蔽
v. 遮蔽；尾随（shadow 的 ing 形式）
例句
What is shadowing?
什么叫shadowing ？
Using the shadowing technology allowed me to get instant help when I got stuck.
利用跟踪技术，当我遇到困难时可得到及时的帮助。
By applying many thin coats of this adapted glaze, he achieved the smoky shadowing he became famous for.
通过使用多次调整过的薄釉层，达芬奇获得了这种让他闻名于世的朦胧阴影效果。
