如题所述
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[è¯å ¸] millionth; [æº] ppm;
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The bomb must explode within less than a millionth of a second.
[è¯å ¸] millionth; [æº] ppm;
[ä¾å¥]ç¸å¼¹å¿ é¡»å¨ä¸å°ç¾ä¸åä¹ä¸ç§çæ¶é´å çç¸ã
The bomb must explode within less than a millionth of a second.
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