1.少年老成
to have an old head on young shoulders
2.少不更事
wet behind the ears
3.天无绝人之路
God tempers the wind to the shorn lamb. /When one door shuts another opens.
4.天下乌鸦一般黑
Crows are black all over the world.
5.天助自助者
God help those who help themselves.
6.天有不测风云，人有旦夕祸福
It is the unexpected that always happens.
7.天衣无缝
These two ideas just fit like a glove.
8.天涯海角
ends of the earth(out-of-the-way places; the uttermost part of the earth)
9.天经地义
a matter of course (a universal truth; it goes without saying that...)
10. 毛遂自荐
to recommend one's own person
注：
shorn lamb：已剪过毛的羔羊
crow：乌鸦
all over the world：全世界
