at the beginning of

The teacher took attendance at the beginning of every class.

每次上课老师都要点名。

He put in a spurt at the beginning of the eighth lap.

他进入八圈时便开始冲刺。

This huge triumphal arch was erected at the beginning of this century.

座巨大凯旋门是本世纪建造。

The important events at the beginning of the century provided the backdrop for his novel.

本世纪些重大事件为他小说提供了背景。

We are only at the beginning of the voyage,and have to learn an entirely new system of seamanship.

我们刚刚踏上航程步,还有个全新航海技术要学呢。

The most stable biradical rule,which was put forward at the beginning of the discovery of the P-B reaction,was used to explain its regioselectivity.

在P-B反应发现之,人们直用“最稳定双自由基规则”解释其区域选,规则对有些体系却不适用,近年来有人开始运用“自旋化学”理论来解释区域选。

As a freethinker, you love nothing more than to let your thoughts and imagination roam -- and at the beginning of this week, a discovery awaits.

做为个自由思想家，你比做任何事都喜欢是让你自己思绪和想像去漫游--在周开始，个探索在等待着你。

I was so eagre to convince others I was actually older than I looked, and i would always wear my mum's dark colour clothing at the beginning of my teaching career.

除了看大量书外，也拜了师父，更重要是接触大量真假古董。东西看多了，便有了从量变到质变飞跃。当然本人天分和视觉记忆力还是出类拔萃。