sidewalk manhole

例句：

1. 1.The sidewalk was littered with trash and the manhole cover was missing.
   人行道上到处都是垃圾，井盖不见了。
2. 2. The city engineer had to replace the old manhole with a new one.
   市政工程师不得不用一个新的来替换旧的。
3. 3. The construction crew had to dig up the sidewalk to repair the manhole.
   施工队不得不挖开人行道来修理井盖。