今天我们要学的词是 swath. swath 用作名词的意思是大片的。Swaths of eastern China were choked by heavy smog on Tuesday, bringing travel chaos to the region's roads and airports. 中国东部大片地区周二被严重的雾霾笼罩，给这一地区的道路和机场交通带来混乱。For decades, Americans have migrated toward urban areas seeking opportunities, emptying out large swaths of countryside. 几十年来，美国人迁往城市地区寻找机会，使得大片乡村地区空下来。