lacking
adjective uk/ˈlæk.ɪŋ/ us/ˈlæk.ɪŋ/
be lackingC2 缺少，缺乏
If something that you need is lacking, you do not have enough of it.
Enthusiasm has been sadly lacking these past months at work. 在过去的这几个月里大家的工作热情严重不足。
be lacking in somethingC1 缺少（某种素质），缺乏（某种因素）
to not have a quality
He's totally lacking in charm. 他一点儿魅力都没有。