The where and when are not known.

地点和时间都不知道。

I count myself fortunate to have known him.

我觉得认识他很幸运。

His hostility to your plan is well known.

他对你的计划所持的敌意是众所周知的。

His proficiency as a surgeon is well known.

他作为一名外科医生的水平是有名的。

The drug is variously known as crack or freebase.

这种毒品的叫法五花八门，有人称为crack，也有人叫它freebase。

She’s the biggest liar I’ve ever known.

她是我所见到的最厉害的说谎大王。

The thing was not known to be litigious when purchased.

那东西买来时大家都不知道它在法律上是有问题的。

Asteroids,also known as “minor planets”,are numerous in the outer space.

小行星,亦称为“小型行星”,在外太空中不计其数。

Hence an endocentric construction is also known as a headed construction.

因此向心结构也叫做中心结构。

For reasons best known to himself, he wears three pairs of socks.

谁都猜不透他为什么要穿三双袜子。

Stereographic projection is known since the antiquity and was originally known as the planisphere projection.

立体绘图法原称为星座盘投影法。

She discovered a world of parties and pleasure she had hitherto only known by hearsay.

她发现了一个以前只是略有听闻的花花世界。

Milagros was born with a rare congenital condition called sirenomelia, which is also known as "mermaid syndrome".

塞隆出生时就患有一种罕见的先天性疾病“并腿畸形”，这种病又被称为“美人鱼综合徵”。

Podophyllotoxin is a natural product isolated from Podophyllum peltatum and P. emodi and has long been known to possess medicinal properties.

鬼臼毒素作为鬼臼属植物的主要活性成分,已经有广泛的研究报道。

The actress Katharine Hepburn is nearly as well known for her pompadour as she is for her portrayals of independent, feisty women.

女演员凯瑟琳赫本的束发几乎和她所饰演的独立好胜女子一样出名。

Following his success as a powerlifter, he began entering bodybuilding competitions.In November 2006, the boy formerly known as “the bag of bones” became Mr.Universe.

紧接着，作为一个成功的举重运动员，他开始进入体型竞赛。

This perturbation of the electronic structure has been known as "pressure-tuning", which can reveal the piezochromism and changes in electronic spectra due to structural distortions.

电子结构的扰动一般被称为“压力调整”，可以用来解释形变产生的压色性。

The plagal cadence, sometimes known as the Amen cadence from ecclesiastical use, is the progression from the chord of the subdominant to the tonic, IV - I.

变格终止，有时也被称为源于教会的“阿们终止”，是指从下属音和弦到主音和弦的进行，IV–I。

But believe me, we have many other different grapes in our region like Malvasia or Pecorino - they are small grapes and not very well known but fantastic as well!

但是请相信我，我们的庄园还有许多别的不同的葡萄品种，比如玛尔维萨和佩科里诺，这些都是小葡萄，不是非常有名，但是仍然很美妙！

Heulandite is one of the most common and one of the most well known members of the Zeolite Group. It can have a nice pearly luster and lovely colored hues......

片沸石是最常见最知名的沸石之一。它有很好的珍珠光泽和可爱的颜色。