第一: first; primary; foremost; fi ...道: road; way; route; path阀: established house or power g ...第一道阀；根部阀: primary valve第一道菜: starter uk noun第一道侧幕: tormentor第一道光线: at first light第一道气环: top compression ring第一道筛: primary screen第一道曙光: first light第一道活塞环,第一道气环: top piston ring第一道环槽岸: head land第一道压缩环: tocompression ring; topcompressionring第一道阻挡层: primary barrier黎明的第一道曙光: the golden rays of the dawn一道: 1.(一同; 一路) together; on the same path; side by side; alongside 咱们一道走吧。 let's go together. 他和几个朋友一道来的。 he came along with some friends.2.(一个) a; one 一道题 a problem; 一道闪电 streak of lightening当冬天的第一道气息: when the first breath of winter第一道侧幕背面塔架: tormentor tower第一道主菜，通常为海鲜: enree幸福生活的第一道防线: pre-marital check-ups should be encouraged管道阀: pipeline valve烟道阀: chimney valve直道阀: through way valve这是进入外企的第一道护身符: language skill appearance working skill experience .etc. language地下管道阀: culert ales; culvert valves
