This paper is focused on the inverse problem of doubly center matrices.

You've got to be doubly careful when you're driving in fog.

雾天开车你得加倍小心.

Her life is doubly interesting because she became famous so young.

她的生平倍加有趣,因为她年纪那么轻就已成名.

All fibers are more or less doubly refractive.

所有纤维都具有程度不同的双折射.

Time is an illusion. Lunchtime doubly so.

时间是一种幻觉. 尤其午餐时间.

A referendum showed beyond doubt that voters wanted independence.

全民公决无疑显示选民支持独立。

I doubt it to be truth.

我怀疑这是真实的.

I doubt whether your procedure would be considered regular by authorities.

我怀疑当局是否会认为你的手续合乎规定.

No doubt it would be safer to do it that way, but it would be slower.

这样办固然稳当些, 可就是要慢一些.

Yo mama so fat she has been declared a natural habitat for Condors.

Yomama是如此之肥,她被定为秃鹰的自然栖息地.

I doubt the sanity of such a plan.

我怀疑这个计划是否明智.

What would our condors feed on if no one was in danger?

你不发生危险,那我们秃鹰吃啥 呢 ?

The words hardly permit doubt.

这些话不容置疑.

I doubt that he will come.

我看他不见得会来.

The vacancy of her expression made me doubt if she was listening.

她茫然的神情让我怀疑她是否在听.

There is no doubt whatever about it.

关于这一点,没有任何疑问.

a niggle of doubt

一丝挥之不去的疑虑

It can no doubt be fairly argued that Sir John, whose pay is linked to performance, is entitled to every penny.

毋庸置疑，既然约翰爵士的薪水是与业绩挂钩的，他的每一分钱都是理所应得的。

Five minutes from the end , the outcome of the match was still in doubt.

比赛只剩下5分钟了, 可是结局仍然难以预料.

I have no doubt that the man is guilty and that he deserves punishment.

我毫不怀疑此人是罪有应得。

His inclusion in the team is in doubt.

他是否能被选入这个队还未定案。