two pieces ; two tablets
大风从屋顶上刮下了一两片瓦来。
The wind dislodged one or two tiles from the roof.
《牛津词典》
他会吃两片阿斯匹林,然后摊开四肢躺在床上。
He would take two aspirin and sprawl out on his bed.
《柯林斯英汉双解大词典》
我吃了两片白面包和一面黑面包。
I ate two pieces of white bread and one piece of black bread.
youdao
And so both of these lobes together constitute a pi bond.
上下两片叶一起组成了一根π键。
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