worried
烦恼的，担心的

例句：
The old man felt worried about how to live in the cold winter.
这位老人为如何度过寒冷的冬天而担心。 

try one's hand
尝试，试身手
  
例句：
I thought I would try my hand at bowling, although I had never bowled before.
我虽然从没玩儿过保龄球，但我想尝试一下。

It's a deal.
一言为定。

对话：
A: You pay for the supper and I will treat you to a movie. O.K.?
B: It's a deal.

A：你付晚饭钱，我请你看电影，怎么样？
B：一言为定！