点击下方单词,选择对的这个单词
不及物动词
1. 低垂;下垂;垂落If something droops, it hangs or leans downwards with no strength or firmness.
1. a shape that sags
e.g. there was a sag in the chair seat
Synonym: sag
多通过句子记忆单词,而不是单独死记硬背。