shears⽤单数还是复数
复数。⽤作名词，意思是⼤剪⼑；剪切机；剪下的东西(shear的复数)；例句：He is cutting the branches with a pair of shears。他正⽤⼀把⼤剪⼑剪树枝。
shears⽤复数
n.⼤剪⼑，剪床
weight什么时候用复数
v.剪⽺⽑( shear的第三⼈称单数 )；切断；剪切
And so be took his shears and walked quietly away .
他拿起剪⼑，默默地⾛了。
Using cranes armed with metal shears capable of slicing five-centimeter-thick steel , the companies would carve the wreck into liftable chunks 200 to 300 metric tons in weight . Afterward , they would use electromagnets three meters in diameter to clean the seafloor of debris .
他们考虑⽤配备⾦属剪的起重机，剪⼦能切割5厘⽶厚的钢板，把船切成每块重量在200吨到300吨之间可以浮起来的⼤⼩，然后再⽤直径3⽶的电磁铁清理海底的碎⽚。

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