虽然在总人口中所占比例很小，但当很大比例的青年男子被迫迁出某一地区时，可能对当地产生巨大的影响。
Although a small proportion of the total population, this perhaps had a massive local impact when a large proportion of the young men were removed from an area.
但当他开口，说话的语速虽然很慢，却很清晰，好像每一个字他都需要集中很大精力。
When he does, the words come slowly but clearly, as though they've required some concentration.
但当研究人员把老鼠放入不同的房间，他们看到了很大的区别。
But when the researchers put the mice in a different chamber, they saw a big difference.
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