heavy比较级和最高级分别是heavier和heaviest。heavy的意思是重的，沉的。heavy的例句Her breathing became slow and heavy（她的呼吸变得缓慢而粗重）。
heavy的例句Tanks are heavy on fuel and destructive to roads（坦克要耗费大量的燃料，而且会破坏道路）；The outside air was heavy and moist and sultry（外面的空气沉滞、潮湿而闷热）。
水利万物而不争,
而万物莫能与之争。
