| 单词 | to keep at it | 
| 释义 | > as lemmasto keep at it  1.  To work persistently at; to continue to occupy oneself with. Also  to keep at it: see at prep. 16b. ΘΚΠ the world > action or operation > continuing > continue (an action)			[verb (transitive)]		 i-haldOE to hold fortha1325 sustainc1325 containc1330 continuea1340 maintainc1385 carrya1393 keepc1425 to keep upa1535 to stick by ——1551 to hold on1568 to hold out1595 to carry on1609 subsist1633 to keep at ——1825 1825    New Monthly Mag. 16 490  				He should have kept at the law, he would have done for that. 1846    Jrnl. Royal Agric. Soc. 7  i. 130  				By keeping at it all day he is able to get over nearly 2 acres. 1890    Pictorial World 9 Oct. 445/3  				Who could keep at work on a morning like this? 1891    St. Nicholas Mag. 261  				Still they keep at it, early and late. < as lemmas  | 
	
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