查询词典 D.O.

Based on the effects of atomic radius on the Curie temperature, new bismuth layer-structured piezoelectric ceramics Ca〓〓Bi〓Ti〓O〓 with high Curie temperatures and piezoelectric activities were obtained by A-site substitution for Ca.

本论文从取代原子半径对居里温度的影响入手，利用碱金属原子Li，Na，K和Ce原子复合取代层数m=4的铋层状铁电体CaBi〓Ti〓O〓中位于A位的Ca原子，在保持材料高居里温度的前提下获得了压电系数d〓明显改善的铋层状结构压电陶瓷。

He was a D o c t o r of Philosophy in economics of Yale.

他是耶鲁大学经济学博士。

In order to explore the mechanism of polymerization between lignin from effluent of pulping process and lignin precursors, the method and mechanism of co-polymerization of coniferin with model compound of β-O-4 type lignin were investigated.

为了探讨造纸废水中残余木质素与木质素前驱物之间的聚合反应机理，研究了β-O-4型木质素模型化合物与木质素前驱物松柏醇－β-D-葡萄糖苷－[α-13C]的聚合反应方法及其反应机理。

Hardware design includes equipment selection ,I/O address assigning ,exterior input circuit designing ,exterior output circuit designing , the joint circuit of sensor etc .

硬件设计主要包括装置选型、I／O地址的分配、外部输入电路设计、外部输出电路设计、通讯模块设计以及A／D模块和传感器的连接电路等。

D to set up the pressure on the bridge at 4 kg / cm2 (o.4 MPa) over the gas pipelines, more than 10 kilovolt high-voltage power lines and other inflammable and explosive pipe

在桥梁上架设压力在4公斤／平方厘米(o.4兆帕)以上的煤气管道、10千伏以上的高压电力线和其他易燃易爆管线的

O great star disappear'd—O the black murk that hides the star!

啊！巨星消逝了—啊，那遮没星星的一片阴暗！

It showed the primary decomposition reaction took place with the breaking of glycosidic linkage, the cleavage of O-glycosidic bond as expected.

同时，香叶基-β-D-吡喃葡萄糖苷热裂解产生了特征香味成分香叶醇，其裂解的基本反应是O-糖苷键的断裂。

C ', J5 D; y$ O; V1 D- c8 J A touring group of retired government employees learns about the brash new sights of Dalian, a city on the rise in China's Northeast.

'9 U* J1 _， J1 j9 D% K 一个退休干部旅行团正在听导游介绍中国东北窜升中的城市——大连急速发展的新市景。

Methods:Dehydration of D-mannitol,followed by a reaction sequence of selective protection,benzylation,deprotection,tritylation,benzylation and removal of the trityl group,afforded the title compound.

以D-甘露醇为原料构建2，5-脱水-3，4，6-O-三苄基-D-葡萄糖醇的手性分子骨架，通过选择性地对多羟基的保护和脱保护达到对产物分离的目的。

The d octor a d vised me to d o more excercise.

医生建议我多做运动。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。