- 相关例句
The Sahara desert, for example, creeps southward at a rate of thirty miles annually.
例如, 撒哈拉沙漠以每年30英里的速度向南方推移.
辞典例句
The world urban population is rocketing upwards at a rate of 6.5 per cent per year.
世界城市人口以每年6.5%的速度急速上升.
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