碧峰峡是位于四川省雅安市的一处四季常青的风景名胜，我永远不会忘记2011年我第一次到这里旅游的时刻。
Bifeng Gorge is a evergreen scenic spot locats in Ya 'an city, Sichuan province. I never forget my first trip to it in 2011.
在一个季节流感结束的时候菌株的传播可能是引起下一季流感暴发的原因(因而被称为前峰波现象)。
Strains circulating at the end of one season's epidemic are sometimes responsible for the next season's outbreak (the so-called herald wave phenomenon).
讨论了由同一气源、同一条输气管道供气的多城市输配系统的联合季调峰。
The joint seasonal peak-shaving of natural gas transmission and distribution systems from the same gas source through the same transmission pipeline in multiple cities is discussed.
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