be lacking in 和 lack for区别

be lacking in 和 lack for区别 lack的用法请问a lack of、be lacking in和lack for用法上有什么区别? lack 的用法a lack of、be lacking in和lack for用法上有什么区别吗?尤其是lack of 请问lack,lack for,be lacking for有什么区别? be lacking in,lack词性? to lack in 怎么用啊 和 be lacking in 什么区别 lack相关短语的区别,be lack of,be lacking in ,lack sth,a lack of sth 英语中Lack的用法请问lack,a lack of,be lacking in这3个词有什么区别.我知道lack可以做 be lack of和be lack in区别 lack of 和lack for 的区别? be lacking in life 关于短语be lacking in