The mission was designed to test the potential for astronauts to escape without a space craft in an emergency.
这个任务最初是用来测试宇航员紧急情况下不使用航天器来逃生这一潜能的。
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As with any screening test, and most vaccines, the process is not 100 percent effective, and a small number of women with precancerous cells escape detection with false negative tests, for example.
Li, who will have to wait for two more weeks before she finds out her test results, said she had considered studying college overseas to escape Gaokao.