lack

Alex’s real problem is that he lacks confidence.

亚历克斯的真正问题是缺乏信心。

comments based on a total lack of information

全无根据的评论

Does their apparent lack of progress mean they are not doing their job properly?

他们看来没有什么进展，是不是说明他们没有做好本职工作？

tours that are cancelled for lack of bookings

因预订人数不够而取消的旅游

There was no lack of willing helpers.

主动提出帮助的不乏其人。

health problems linked to poor diet and a relative lack of exercise

与不良饮食和运动相对缺乏相关的健康问题