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吃了个肚歪
The most distinguishing feature: saved labour, improve the environment.
天天快乐1414
we should use less people to do more work.
追梦1区14号
人力物力的消耗 [词典] drain on manpower and material resources; gulley drain【建】下水道spray drain(以小树枝填在沟槽内, 上面覆土而形成的)排水暗沟
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