We must be polite to the old.

对待老人我们必须要有礼貌。

youdao

We must be polite, above all, to old people.

我们要有礼貌，尤其是对老年人。

youdao

We stipulate that our salesgirl must be polite to customer.

我们规定我们的售货小姐必须礼貌待客。

youdao

We stipulate that our salesgirl must be polite to customer.

我们规定我们的售货小姐必须礼貌待客。

youdao