slough off

详细解释:抛弃, 丢弃

英语解释：

动词 slough off:

discard as undesirableseparate from surrounding living tissue, as in an abortion

例句：

Every spring this snake sloughs off its skin, as it has grown too big for it.每年春天这条蛇都要蜕去旧皮，因为它身体长大，旧皮不适用了。