Just by n, l, m, s is inadequate.
仅仅靠n,l,m,s是不够的。
This paper introduced the design of M. S. W collection system and treatment engineering in Leshan City.
介绍了乐山市城市生活垃圾收运系统及处理工程的设计情况。
This paper introduced the design of M. S. W collection system and treatment engineering in Leshan City.
介绍了乐山市城市生活垃圾收运系统及处理工程的设计情况。
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