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We investigate the reaction involving alkynes and α-halophenylethanone in presence of catalyzer to occur nucleophilic addition reaction.

我们还对炔烃与α-卤代苯乙酮在催化剂存在下发生亲核加成反应做了一系列的探索。

Computer occur in the near future, in order to plotter and cathode-ray tube screen graphics output, then the birth of the computer graphics.

计算机出现不久，为了在绘图仪和阴极射线管屏幕上输出图形，计算机图形学随之诞生了。

E-coli, for instance, does not occur or rarely occurs when cattle are allowed to range feed, but breeds in crowded cattle pens where the cattle are wading in their manure.

例如，当牲畜在放牧场里被喂养时，是不会或者很少产生大肠杆菌的，但被关在拥挤的牲畜圈里喂养，践踏着自己的粪便时，就会产生大肠杆菌了。

This may result in yarns that are considerably weaker in some areas than in others, caus in g breakage to occur easily at the weak po in ts.

从而引起应力的不均匀分配。纱线某段的强度比其它段要低，在纱线的弱段容易产生断头。

People can see that in real life,"Cautiousness" moral realm, and only in the individual saints and scholars in it to occur.

人们看到，现实生活中"慎独"的道德境界，只有在个别的圣人和士人中才能够出现。

Cesium and water, and even and low temperature to - 116 degrees of ice can occur with violent reaction, also can generate stable halogen halide, this is because it is caused by large radius of ions.

铯和水，甚至和温度低到-116℃的冰均可发生猛烈反应，与卤素也可生成稳定的卤化物，这是由于它的离子半径大所带来的特点。

Numerical simulations show that similar to their counterpart in deterministic nonlinear system some symmetry-breaking bifurcation may occur in the stochastic Duffing-Van der pol system, and Chebyshev polynomial approximation is an effective approach in solving dynamical problems of nonlinear system with random parameter.

数值模拟显示随机Duffing-Van der pol系统与确定性均值参数系统有着类似的对称破裂分岔行为，文中的主要数值结果表明Chebyshev多项式逼近法是研究非线性随机参数系统动力学问题的一种有效方法。

These are the arabic numerals 0 to 9, except in the case of the last or check digit an upper case X can sometimes occur.

因为ISSN这种数字形式可能在同种情况下用作它途，如国际标准图书编号或地方控制数字

Angular cheilitis malnutrition and nutritional deficiencies in vitamin B family, or zinc deficiency often occur in persons to a lack of vitamin B group the most common cause of angular cheilitis.

营养不良性口角炎在营养缺乏和维生素B族或锌缺乏者中常有发生，以维生素B族缺乏引起的口角炎最常见。

Ear pain can occur due to allergy, filling of wax in the ear, chillness, entry of any foreign body in the ear or infection in the Eustachian tube which connects ear, nose and throat.

耳朵痛，可能会发生因过敏，填补蜡在耳，寒冷，进入任何外国机构在耳或感染的咽鼓管是连接耳，鼻，喉。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。