1. You should give him a timely warning.
    你应当给他一个及时的警告。

2. Of course, the books and periodicals that are warning society about the removal of jobs, "the end of work", and wage decreases only serve to increase public anxiety — a slow-motion variation of shouting "Fire!" in a crowded theate
    当然, 那些因工作岗位的消失、"工作完蛋了"和工资减少而对社会发出警告的书籍和期刊杂志只不过是起到了增加公众焦虑的作用--只是在挤满了观众的戏院里有人大叫"着火啦"的那种景象的慢镜头的变种而已。

3. Let me sound one note of warning.
    在此我警告一句。