Their friends suggested they should put up their prices.

　　他們的朋友們建議他們提高價格。

　　Their success is ascribable to the quality of their goods.

　　他們的成功在于商品的質量。

　　Their success is due in large part to their determination.

　　他們的成功在很大程度上應歸功于他們的決心。