单词	back vent
释义	back vent noun : a ventilating pipe attached to a waste pipe on the sewer side of its trap to prevent siphonage back venting noun Word History First Known Use 1915, in the meaning defined above
随便看	secessionist secessionists secessions secest sech Sechelt sechelt Sechium Sechuana sechuanae sechuanas seck Seckel seckels secle seclude secluded secludedly secludedness secludednesses secludes secluding opossum mouse opossum rat opossum shrimp

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