跟不上趟兒cannot: cannot =can not. catch: vt. (caught; caught) 1.捕捉;逮著 ...up: adv. (superl. uppermost ) 1. ...rank: adj. 1.繁茂的,蔓延的;過(guò)于肥沃的。 2.臭極的, ...cannot catch up with one: 跟不上功課下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯