The actor mouthed the words of the recorded song.

演员出声地哼着那首已经事先录好音的歌曲。

To be forewarned is to be forearmed.

事先得到警告即先有了准备。

Owing to a previous engagement, I shan't be able to come.

因事先另有约会, 我无法前来。

The platoon made its way to the pre-arranged rendezvous in the desert.

这个排向事先约定的沙漠中的会合进发。

Please inform me of your arrival time beforehand.

请事先通知我你抵达的时间。

Jim had the forethought to book in advance.

吉姆有远见作了事先预订。

A little forethought would have saved you much trouble afterwards.

如果事先稍微考虑一下的话, 就会省掉你以后的许多麻烦了。

He hasn't the least foreknowledge of this matter.

关于此事他事先一知道。

Anglers are required to obtain prior authorization from the park keeper.

垂钓者必须事先得到公管理者的许可。

The witness at the trial had been carefully primed by defence lawyers.

被告律师对出的证人事先作了仔细的指导。

They proposed to make arrangement beforehand.

他们提议事先做好安排。

I would be leery of committing my company to employ hundreds of Indian workers,sight and skill unseen.

在对几千名印度工人的技术情况事先还了解时,我是会随便让我的公司雇用他们的。

We bought the table sight unseen and were pleased to find it was perfect for our kitchen.

我们事先没看就买下了那张桌子,发现放在厨房里合适极了,这使我们很高兴。

All bumbling conjurers, clumsy squires, no-talent bards, and cowardly thieves in the land will be pre-emotively put to death.

所有无能的魔术师，笨拙的随从，没有天分的吟游诗人以及胆小的盗贼都将会事先被处死。

7 Permanent weld backing bars, consumable inserts and nonconsumable insert rings are not permitted without prior written approval from SECCO.

事先没有赛科公司的书面批准，允许有永久焊接的支撑杆、熔化性嵌条和可熔嵌环。

The boss called the foreman on the carpet for granting sick leave to a worker without first asking for permission.

老板训斥那个工头未经事先请示就擅自批准一个工人的病假。

If you want to go to the concert, you'll have to make a reservation, or there will be no tickets.

如果你想去听音乐会，你得（事先）预订（票），否则会没有票的。

Compared with the computer tutor, with the tutee the direction of control between the computer and the user is reversed.

准备演示的内容可以即时通过计算机输入，可以事先制作贮存在硬盘中，并通过桌面演示软件再次展示出来。

There was a half of bason of offwhite barnyard grass flour on the chopping board, it looked like arranging for in advance.

案板上放着半脸盆灰白色的稗子面，看来是事先给我准备的。

To suppress the interference of amide groups in the amorphous phase,the film was placed in heavy water for 4 weeks for deuteration and the deuteration rate was determined.

为了排除非晶区域酰胺基团的影响,事先对尼龙1010的样品膜进行了氘代,并测量了其最终氘代率。