We couldn't understand them because they were talking in Chinese.

　　我們聽不懂他們在講些什么，因為他們說的是漢語。

　　His school work is suffering because of family problems.

　　由于家庭問題，他的學業日漸退步。

　　Two players are out of the team because of injury.

　　兩名隊員因傷退出了比賽。

　　We have had to raise our prices because of rising costs.

　　因為成本日益上漲，我們不得不提高價格。

　　His school work is suffering because of family problems.

　　由于家庭問題，他的學業日漸退步。