1 I weigh the box -----------weigh是及物动词------- 秤-----的重量2 The box weighs 20 KG -------weigh是连系动词,20 KG 是表语 ==The box is 20 KG in weight.（盒子重20公斤） === the box is 20KG heavy....A goldfish can weigh up to 40 grams.这句话什么意思一只金鱼重达40克。weigh up什么意思称，估量，称出