本世纪初，是什么推动了欧洲电动车销售的增长？
What brought about the boost in ebike sales in Europe at the beginning of the century?
本世纪初，约有三分之一的作物工人年龄在35岁以上。
At the start of this century, about one-third of crop workers were over the age of 35.
本世纪初，这一地区的一些印第安人常常赤身睡在吊床里。
Some of the Indians of this region, earlier in the century, used to sleep naked in hammocks.
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