之前 before; prior to; ago 五年之前 five years ago; 在她动身之前 prior to her departure; 开会之前 before the meeting; 临走之前 prior to departure; before departure; 两周之前 two weeks ago
He recalled the occurrences before he fell asleep . 他想起了入睡之前的种种经过。
More important are tablets of above 1400 b.c . 公元前1400年之前的石碑具有更重要的意义。
It may also refer to the item before the one being discussed . 它也可指正在谈及的事物之前的一个。
Careful reconnaissance is essential before observations begin . 观测开始之前的一项主要工作是认真选点。
That was before i took a course in public speaking at the dale carnegie institute . 那是我在戴尔卡内基学院选修演说术之前的事。
Senescence may be defined as the deteriorative events which precede the death of a mature cell . 衰老是成熟细胞死亡之前的败坏过程。
I stood for a long while watching the white dome against a flashing blue sky, with a very religious feeling . 我怀着一种极为虔敬的心情,久久地凝望这个映照在光辉的蓝天之前的白色圆顶。
Because the larger the event, the larger the number of oscillations of the transducer before they decay below the trigger level . 因为事件越大,传感器在它衰减到低于触发器电平之前的振荡次数越多。
The sound changed, not into the silence which had preceded the arrival of these stunning news, but into stifled mutterings . 群众的声音变了,不是回到这骇人听闻的消息下达之前的沉默,而是变成闷声闷气的低语。
At the period just preceding the advent of bartleby, i had two persons as copyists in my employment, and a promising lad as an office-boy . 就在巴特比光临之前的一段时间里,我已经雇用了两个人任抄写员,一个有出息的孩子当听差。