It takes 3 hours to get to Gorely Volcano from the city by car.
从城里开车去Gorely火山需要三个小时的时间。
If sometimes it takes 3 hours to do something, another time 7 hours, and another time 4 hours, we might just estimate that on average it takes about 5 hours to get the work done for this task.
如果任务有时需要3个小时，有时需要7个小时，有时又需要4个小时，那么平均起来我们估计需要5个小时来完成这项工作。
It takes 40-45 days to sail what you can fly in just under 12 hours but it visits nearly every island in the Pacific on the way and it stops for 2-3 days.
这一程需要40—45天，而你搭飞机只需要12个小时，但是几乎可以访问途中的每一个太平洋岛屿，期间需要停留2—3天。
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