they的形容詞性物主代詞是

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`成功在於商品的質量。

Their success is due in large part to their determination.

他們的成功在很大程度上應歸功於他們的決心。