在近几年里，我所在的城市环境发生了巨大的变化。
Great changes of environment have taken place during the recent years in my city.
在近几年里，商业和体育捕杀了大概一百万或更多的鲨鱼。
During a recent year, business and sport fishing killed an estimated one million or more sharks.
在近几年里，借助于相位变化图，已经对热处理过程中发生的复杂的结构变化有了很多的了解。
In recent years there has been a greater understanding of the complex structural changes taking place during heat treatment, with the help of phase transformation diagrams.
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