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The introduction of the electron withdrawing ester groups to the chromophore makes compound 2 to be a very sensitive fluorescent probe for Na analysis. 研究结果表明：在荧光团中引入吸电子的酯基使化合物2成为一种高灵敏性的检测钠离子的荧光探针。
In this work, several chalcone derivatives which contained strong electron donor moiety and different groups with various electron withdrawing ability were synthesized. 本工作合成了几种具有强电子给体和不同拉电子能力基团的查耳酮衍生物;
The introduction of the electron withdrawing ester groups to the chromophore makes compound 2 to be a very sensitive fluorescent probe for Na+ analysis. 研究结果表明:在荧光团中引入吸电子的酯基使化合物2成为一种高灵敏性的检测钠离子的荧光探针。
The electron withdrawing group (F) being introduced into the alkyl groups of the n-hexyl ZDDP is able to strengthen chemical adsorption between ZDDP and Fe atoms. 在伯烷基上吸电子基团能增强硫原子与铁原子之间的化学吸附作用力。
The reason is that the electron withdrawing and donating of two substituting groups result in the changes in the density of electron cloud of chemical bonds in ortho position. 这是由于两个取代基的吸或供电子引起了相邻化学键的电子云密度发生变化,使旋光度相应变化,从而导致旋光性。
It could also use the electronic withdrawing ability properties to moderate the ferrocene’s oxidative potential. 更可以利用其拉电子能力所引起的共振效应而提升二茂铁单元的氧化电位。
The legislative history shows that the 1976 legislation was intended to eliminate the President's implied withdrawal power under the Midwest Oil doctrine. 这一立法的历史显示，1976年的法规的目的在于废除总统根据“中西部石油”原则所指的土地收回权。
The king was shorn of his power by his nobles. 国王被手下的贵族们剥夺了权力。
Open tender for purchasing power transformer. 公开招标购买电力运输设备。
It's past the deadline to withdraw. 现在已经过了退课的最后期限了。
James unleashed his power on Susan in revenge. 杰姆斯利用权力报复苏珊。
They argued him into withdrawing his complaint. 他们说服他撤回了投诉。
Industry is a heavy user of electric power. 工业需耗费大量的电力。
Expedite offer afraid buyer ready withdraw as others contact him. 糨公司正与之接触，请速予报价，否则买主准备撤走。
There was a power cut and all the lights went out. 因停电所有的灯都熄灭了。
A new nuclear power station is on the stocks here. 这座新的核电站在建造之中。
The general refused to withdraw his troops. 那个将军拒不撤回部队。
By power we mean the rate of doing work. 我们说功率就是指做功的速率。
Tell the men to withdraw from their new position. 告诉那些人从新的阵地上撤出。
The media have a lot of power today. 现在大众传播媒介有很大的力量。