例句與造句

1. We choose changqing block , which is mostly dwelling district and some other function region . we investigate and measure noises in the area , and find out main social activity noise ( crowd noise , residence renovation noise , establishment noise )
   我們選擇某一典型的城市區(qū)域? ?長慶街道，該區(qū)域是以居住為主，商業(yè)發(fā)達，第三產(chǎn)業(yè)興旺，公建設(shè)施齊全，兼有行政、金融，及少量第二產(chǎn)業(yè)，社會生活噪聲源也相對比較齊全。
2. It's difficult to find crowded noise in a sentence. 用crowded noise造句挺難的