width of sanitary protection zone

例句：

1. 1. The width of the river is about 20 kilometers.
   这条河的宽度大约是20公里。
2. 2. The car's width is just wide enough for two people to fit in.
   这辆车的宽度刚好足够两个人挤进去。
3. 3. The new building has a width of 50 meters.
   这座新建筑的宽度为50米。