Severe steric effects at the reactive carbon would impede the substitution.大的立体效应阻止在碳上的取代.It was intended to impede the apprehension of the person.它旨在妨碍对该人的拘押的.They also impede backmixing of sand.同时也可防止砂子的返混....
It was intended to impede the apprehension of the person.它旨在妨碍对该人的拘押的.They also impede backmixing of sand.同时也可防止砂子的返混.At no time did I make an attempt to impede any investigatory effort.我绝没有试图妨碍过任何调查工作。Severe steric effe...
At tea-time, Victoria sang duets with her Consort, Prince Albert.喝下午茶的时候，维多利亚与其夫君艾伯特亲王表演了二重唱。Groups are called duets, trios, quartets , choruses , choirs, etc.集体表演称之为二重唱 、 三重唱 、 四重唱以及大合唱等等.However, this is not necessaril...
Around the world, governments have subsidized the housing of middle and upper-income groups...全世界各国政府都为中高收入群体提供过住房补贴。Rice production duly expanded, greatly facilitated, it was thought, by subsidized credit.曾经有一种观点, 补贴信贷会...
The surface reactivity of many nonblack fillers generally precludes strong bonding with this type of matrix.许多非碳黑填料的表面反应性一般阻碍与该种基质形成牢固的粘结.Cortical grafts, whether autogeneic or allogeneic, at least initially act as weigh...
该是母鸡孵蛋的时候了.It is time for hens to brood.是母鸡孵蛋的时候了.It's a time for hens to brood.这化石显示,早在鸟类出现之前,孵蛋的行为就已经演化出来.The fossil demonstrates that brooding behavior evolved long before there were birds....