cannot<正式>无法；不能，不可以；禁止cannot help herselfvi.不能抑制自己(不能自拔)cannot take the cue接不上碴儿cannot help himselfvi.不能抑制自己(不能自拔)cannot help oneself情不自禁,不能自制cannot help smiling不觉莞尔cannot choose but dov.只得Cannot be set on non不能在非cannot help yourselfvi.不能抑制自己(不能自拔)cannot blink it away回避不了它cannot stand crushing搁不住压

1. You cannot be too careful in examinations.
   考试时越仔细越好。
2. No man can have too much knowledge and practice.
   知识和实践越多越好。