1.
The substitution of a purine for a pyrimidine, or vice versa is a transversion.
嘌呤为嘧啶取代或嘧啶为嘌呤所取代，叫做颠换。
2.
inverted ladder DA converter
颠倒梯形数模转换器
3.
To reverse the direction of(an alternating electric current)each half - cycle to produce a unidirectional current.
变换电流方向颠倒每一半周（交流电流的）方向，以产生单方向性电流
4.
In other words the whole spectrum of levels is just like that of an alkali turned upside down.
换句话说，整个能级谱恰好就像是上下颠倒的碱金属能级谱一样。
5.
reverse procedure
颠倒程序，颠倒步骤
6.
Encyclopaedia Britannica
《不列颠百科全书》
7.
be off one's trolley
[美俚]神经失常, 发病, 疯疯颠颠
8.
He fell heavily into the surf.
他重颠颠地跌进了岸边的激浪中。
9.
He fell heaviy into the surf.
他重颠颠地跌进岸边的激浪中去。
10.
She is bustling about all day long, serving the people.
她整天跑跑颠颠的给别人办事。
11.
A jogging movement or rhythm.
颠簸颠簸摇动的运动或节奏
12.
She will make the world as mad as she made me.
她会颠倒众生，就像她使我颠倒一样。
13.
Britain is a part of the British Isles.
不列颠是不列颠群岛的一部分。
14.
To move or cause to move with bumps and jolts;bounce.
（使）碰撞、颠簸地移动；（使）震荡，颠跳
15.
The toy robot moved forward with quick jerky steps.
玩具机器人一颠一颠地走得很快.
16.
Of or relating to the ancient Britons.
古不列颠的古不列颠的或与之相关的
17.
A rough wagon ride that jogged the passengers.
把乘客颠来颠去的一段崎岖的马车路
18.
From "Rational Reversal" to "Practical Reversal";
从“理性的颠倒”到“实践的颠倒”