单词	keep at sth
释义	keep at sth 不断地做
随便看	singlefamily single family single family detached house single - family dwelling single-family dwelling single-family-home single family house single-family house single fare single fastening single father single-father single faucet shampoo spray single fault single fed repulsion motor single feed single feed carriage single feeding and multiple receiving track circuit single-feet single-fee traffic single female single fertilization single fertilizer single fiber single fiber cable 如花似朵如花似玉如花似锦如获至宝如获至珍如虎傅翼如虎得翼如虎添翼如虎生翼如蚁慕膻 51400 51401 51402 51403 51404 51405 51406 51407 51408 51409