ADJ-GRADED
缺少的；不足的；沒有的
If something or someone is lacking in a particular quality, they do not have any of it or enough of it.
例句
...if your hair is lacking in lustre and feeling dry...
如果頭發缺少光澤且干枯
She felt nervous, increasingly lacking in confidence about herself...
她感到緊張，對自己越來越沒有信心。