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....
He had been as instructive as Milton's " affable archangel ".他正如米尔顿那位 “ 亲切的天使长 ” 一样循循善诱.While it will be fun, the seminar also promises to be most instructive.这次的研讨会不仅会有趣，而且有可能会颇具启发意义。a most instructive experience获益...
Four thousand troops have been reorganized into a fighting force.4,000名士兵被重组成为一支战斗部队。Classes will be reorganized after the first four weeks.开学四个星期后要重新编班.Yvonne had reorganized the kitchen, which was now orderly and gleam...