2007.12.19 : He always talked big, but never amounted to anything.
他总是夸口，但毫无成就。
talk big: speak boastingly; make exaggerated statements or excessive claims in order to impress people 说大话；吹大牛；言过其实；以期引人注目。
再如:
We dislike those who talk big and do nothing.
我们不喜欢那些专讲大话而不做事的人。
海纳百川，有容乃大；壁立千仞，无欲则刚。