at a time

The albatross can stay airborne at sea for days at a time.

信天翁在海上可以一连在空中待几天.

Niccolini was thundering up the stairs, taking them two at a time.

尼科利尼一步两个台阶地噔噔跑上楼。

Add the cream a few drops at a time.

每次加几滴奶油。

For months at a time, air raids were a nightly occurrence.

一度有几个月，每天晚上都会发生空袭。

I can only carry two at a time.

我一次只能带两个。

Hold the ladder tightly and move up a rung at a time.

抓紧梯子一级一级地往上爬.

Is there room for two people at a time to pass in?

这空间是否能使两人同时进入?

How much can you knock back at a time?

你一次能喝多少?

He tore up the stairs two steps at a time.

他一步两个台阶地飞奔跑上楼.

This restaurant can accommodate two hundred people at a time.

这家餐馆可供200人同时用餐.

He carried on several occupations at a time.

他同时从事几种职业.

Take the pills two at a time.

每次服两粒.

Can I borrow two books at a time?

我可以一次借两本书 吗 ?

He was able to spend only a few days at a time on the island.

他每次去岛上都只能呆几天。

Introduce foods one at a time and notice if you feel uncomfortable with any of them.

一次加进一种食物，注意是否有哪一种令你感到不适。