用“slacken off”造句大全，slacken off造句
Redoubleyoureffortsandnotslackenoff.Youshouldn'tslackenoffinyourstudy.Businessinthesmallvillageusuallyslackenoffduringseverewinters.Hehadworkedwithoutintermissionforsixmonthsandnowcouldslackenofffora...
用“slacken”造句大全，slacken造句
Nothingcouldmakeusslackenoff.Pleaseproceedalongtheselinesanddonotslacken.Oneofthepinsofastringedinstrumentthatareturnedtotightenorslackenthestringssoastoregulatetheirpitch.IwanttoassureyouherethattheC...