chance your arm

• vi. 冒险一试(碰碰运气；豁出去干)

chance your arm的用法和样例：

例句

1. If you are never willing to chance your arm, but always play for safety, you will not very far.
   如果你根本不愿冒险，总是求四平八稳，你就不会获得得很大成功。