单词	垫圈沟 -- 环沟
释义	垫圈沟 ; 环沟ring groove
随便看	not very well的意思 not want to know的意思 notwehr的意思 notwehr, recht der、recht dernotwehr的意思 not well的意思 not well cobble的意思 not well done的意思 not well founded的意思 not well-posed的意思 not well seasoned的意思 not well spiced的意思 not well worded的意思 not well-worded的意思 notwendigkeit的意思 notwheat的意思 not willful的意思 not within an ass's roar of的意思 not within one's power的意思 not without a cause的意思 not without batting an eye的意思 not without batting an eyelid的意思 not without ground的意思 not ... without v-ing的意思 notwithstanding的意思 notwork的意思