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But he says testing the sail in space will be critical.
但他表示，在太空中测试这种帆将是至关重要的。
youdao
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The agency says testing programs and health worker skills have improved.
该机构说，检测程序和健康工作人员技能也得到了提高。
youdao
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The agency says testing programs and health worker skills have improved.
该机构说，检测程序和健康工作人员技能也得到了提高。
youdao