spall drain

例句：

1. 1. The construction crew has been working on the spalling drain for weeks now.
   施工队一直在忙着修建排水沟。
2. 2.The new drainage system is designed to prevent water from spalling into the streets.
   新的排水系统设计用来防止水流入街道。
3. 3.The engineer had to repair the spalling drain after heavy rain caused it to leak.
   工程师在大雨后不得不修理排水沟，因为它漏了。