Howmany pairs 多少双
The birds used the stone-dropping trick spontaneously and appeared to estimate howmany stones they would need.
这些鸟们会本能地运用扔石子的方法，而且好象还会计算需要多少石子。
As we can see from the graph, married women did far more household work than married men did no matter howmany children they had.
不管他们有几个孩子，已婚妇女都要比已婚男士做的家务活多得多。
Howmany books can Iborrowata time?
我一次可以借多少本书？
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