例句：

　　投資航空公司是非常冒險的生意。

　　Investing in airlines is a very risky business.

　　這不是冒險的時(shí)候，他知道他應該按規則行事。

　　This was not the time to take risks; he knew he should play it by the rule book.

　　這是一項冒險的舉動(dòng)，但也許能換得更多的時(shí)間。

　　It was a risky operation, but might buy more time.