We now have a very robust project-tracking system because every person is required to record on a weekly basis what projects they worked on and what tasks they did.
我们现在拥有一个功能非常强壮的项目跟踪系统，这是因为每个人都被要求记录下每一周的工作进展和他们完成任务的情况。
To be an astronaut, you must be in robust health. It is not an occupation for a frail person.
当太空人必须身体强壮，身体虚弱的人不适合从事这个工作。
To be an astronaut, you must be in robust health. It is not an occupation for a frail person.
当太空人必须身体强壮，身体虚弱的人不适合从事这个工作。
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