not to do one's best 不尽全力
If everybody has a definite responsibility and is sure that anybody could become somebody if work hard, then nobody would not do one's best to realize himself or herself.
如果每个人有明确的职责，并且意识到只要努力工作就可以出人头地，没有人不会尽最大努力来成就自己。
The most gifted students do not necessarily perform best in exams. It counts for more to know how to make the most of one's abilities.
学习外语可不光是读读语法规则、记记生词的事，尽管这两件事也很重要，也不容忽视。
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