Markel noted that "flu was classically called a crowding disease in the 19th century."
Markel 说:在19世纪流感是典型的扎堆病。
Then as quickly the rain stopped and a low-lying monster cloud filled with a muggy kind of light and a crowding heat blanketed everything.
然而雨下了不一会儿就停了,低垂的云像怪物一样,云层中透着湿热的光,周围弥漫着一股股热气。
A tough competitor, bracken reduces the value of grazing land by crowding out other vegetation.
作为一个强有力的竞争者,蕨类植物排挤了其他植被,从而降低了放牧地的价值。
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