有更好的办法

know a trick or two know a move or two know a thing or two That's a game two people can play. two of a kidney two of a trade We never know the worth of till the well is dry. A bird in the hand is worth two in the bush. in two claps of a lamb's tail Two of a trade never agree. in two shakes of a duck's tail know a trick or two know for a certainty that... know a move or two know a thing or two be up to a trick or two a plant that lives two years That's a game two people can play serve sb a trick know of the isoenzyme of creatinine kinase that contains two M subunits isoenzyme of creatine kinase that contains two B subunits