有时她必须连续工作20小时而不休息。
Sometimes she has to work without any breaks for 20 hours.
所有者需要通过测试，并完成20小时的飞行时间，才能驾驶。
An owner would need to pass a test and complete 20 hours of flying time to be able to fly.
它通常每天20小时休闲。
It usually relaxes 20hours every day.
max.book118.com我们运用特殊气体，可以使我们在水下作业时间高达20小时。
We use exotic gases, and we can make missions even up to 20 hours long underwater.
www.kekenet.com他说，美国认为哈卡尼与上周喀布尔中部持续20小时的枪战有关。
He said the US believed the Haqqani group was behind a 20-hour gun battle in central Kabul last week.
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