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迅速───rapid;出发───set out

The area has seen a rapid population growth.───这个地区人口快速增长。

The disease is spreading at a rapid rate.───这种疾病正在迅速蔓延。

It seems reasonable to expect rapid urban growth.───看起来期待城市会飞速发展是有道理的。

I feel wrong, and in a rapid exit from the spirit of the storm, over-rapid, suddenly made my mind to have burst gaps, as if having dizzy.───我感觉不对，从精神风波中急速退出，过度的急速，顿时使我的头脑中又一阵空白，天旋地转似的。

Pressure is piled on the Bank of England, which responds with a rapid succession of interest rate cuts, lowering the base rate to just 2%.───英国银行被压力充斥着，据报道银行利率快速衰退，基准利率降至2%

This type of rapid progression, although spontaneous remission may be, but to maintain long, easy to relapse.───此型病程发展较快，虽可自发缓解，但维持不久，易再发。