He rubbed and rubbed but couldn't seem to get clean.他擦了又擦，可就是擦不干净。The home side rubbed in their superiority with a further goal.主队再进一球从而奠定了优势。She rubbed her arms, but they hurt and she desisted.她揉了揉胳膊，感觉很疼就停下了。...
本实用新型涉及一种差动交流调速电动机装置.The utility model relates to a differential alternating current adjustable - speed motor device.显然该新型差动保护兼有两种差动保护优势.It is evidently that novel scheme obtains both excellences of the above two differe...