standardize的词态变化

　　例句：

　　We should standardize our service.

　　我们应当使我们的服务标准化。

　　Attempts to standardize English spelling have not been completely successful.

　　将英语拼写标准化的尝试并不完全成功。

　　Car parts are usually standardized.

　　汽车部件一般都是统一规格的。