分为四个不同的类群: 苏铁类 、 银杏类 、 松柏类、买麻藤类植物以及一些化石类群. There are four widely different living groups: the cycads , ginkgo, conifers , gnetophytes, and several fossil groups.
There is an element of compulsion in the new scheme for the unemployed.新的失业方案里有一种强制因素。Bert was a footloose, unemployed actor.伯特是不受雇于任何人的自由演员。There is already an element of compulsion in existing government schemes for th...
Airliners would be jetting through the sky at 500 miles an hour.大客机会以每小时500英里的速度穿越太空.The firefighters are jetting streams of water at the burning house.消防队员正向燃烧的房屋喷射水注灭火.They spend a great deal of time jetting around the...
The boy's room is a complete contrast to the guest room.这个男孩的房间和客房截然不同。Major's reply came as a complete surprise to the House of Commons.梅杰的回答让众议院大吃一惊。Do they realize we are racing towards complete economic col...
We tested the boat for its buoyancy.我们测试了这条船的漂浮能力。...a mood of buoyancy and optimism.乐观愉快的心情I'll have to take stock, go carefully and regain my buoyancy.我将不得不审时度势，小心行事，同时保持乐观。Air can be pumped into the diving suit ...
裸线式电热元件通常用镍铬合金丝制成.The open wire heating elements are usually made of nichrome wire.从加工性能上说,铬钼激冷铸铁比镍铬激冷铸铁加工性能好.From the machinability, the Mo cold cast iron is liable machine.本论文研究了热压制备添加石墨的镍铬钼复合材料的力学性能及摩擦磨损特性.The mechani...
他们用银色的胶带将所有的门窗都封起来了。Using silver tape, they taped all the doors and windows shut.我喜欢在银色的月光下散步.I like taking a walk under the silver moon.月儿开始发出银色的光辉.The moon began to show her silver flame....