Early settlers built frames of spruce, maple and pine.早期的定居者用云杉木、枫木和松木建造屋架。It was made of soft lumber, spruce by the look of it.其制作材料是软木，看起来像是云杉。He looked spruce in his best clothes.他穿了最漂亮的衣裳,看来很神气....
Scientists had focused on two explanations to solve this conundrum.科学家已锁定两种解释来解开这个难题。Interaction designers often face the conundrum of whether to make their products user - customizable.交互设计者经常面临这样的难题,即是否让他们的产品具有用户定制功能.W...
The lighter version used liquid hydrogen, the heavier used hypergolic propellants.较轻的推进器采用液态氢, 较重的采用自燃推进剂.Pressure - fed engines are particularly susceptible to dissolved gas in the propellants.挤压 式 发动机对推进剂中溶解的气体特别敏感.Thi...
Poison from the weaver fish causes paralysis, swelling, and nausea.龙的毒素会引起瘫痪、肿胀和恶心。One patient suffered headaches, nausea, and faintness.一位病人感觉头疼、恶心、晕眩。Nausea surged in him and he retched violently.他突然觉得恶心，猛烈地干呕起来。...
He tickled gently at its glossy carapace,but the stubborn beetle would not budge.他轻轻地搔着甲虫光滑的壳，但这只固执的甲虫就是不动。Look at the beautiful beetle!看那只漂亮的甲虫！A firefly is a type of beetle.萤火虫是一种甲虫.a rare species of beetle一种稀有甲虫Each s...