catch-upn.
'kætʃəp
中文n. 空白部分起脏；版面污染；急起直追\nadj. 有助于赶上的
空白部分起脏；版面污染；急起直追
adj. 有助于赶上的
词根词源
catch-up (n.)"a working to overtake a leading rival," by 1971, probably a figurative use from U.S. football in reference to being behind in the score. From verbal phrase catch up, which was used from early 14c. in sense "raise aloft" and from 1855 in sense "overtake;" see catch (v.) + up (adv.).
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