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

信天翁海上可以一中待几天。

Take the pills two at a time.

每次服两粒。

To be safe you should go up a ladder one rung at a time.

为安全起见, 登梯子时你应该一步一步往上爬。

He carried on several occupations at a time.

他同时从事几种职业。

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

抓紧梯子一级一级地往上爬。

Suber flushes early and pupas are already found at a time when the caterpillars on ilex are just hatching.

栓皮栎发叶早，当常绿上的幼菌虫还处孵化阶段时，栓皮栎上的已成了蛹。

At a time when the trend of “corpse-art” was the main tendency, Gao Feng’s performance was indeed filled with gentle and humoristic tones.

当时“尸派”艺术颇为盛行的年代，高风的这件行为作品倒显得有些温柔和幽默。

On Monday they even tested a backup procedure—canting the shovel at the end of the probe's robotic arm and shaking it to dribble soil a bit at a time.

周一他尝试了一种替代方法，即将探针的机器手尾部的铲子倾斜来一次弄下一点土壤。