Positive semi-definite matrices are positive definite if and only if they are nonsingular.

Only if the red light comes on is there any danger to employees.

只有红灯闪亮时才有危及职工的险情。

I'm only just beginning to take it in that he's still missing.

我刚刚才开始反应过来，原来他仍然下落不明。

You're only just back from leave.

你才刚休假回来。

We only just climbed up the top of the mountains.

我们好不容易才爬上了山顶.

We have only just enough milk to last till Friday.

我们现有的牛奶勉强可以维持到星期五.

I've only just arrived.

我刚到。

He was born with only one lung.

他生下来就只有一叶肺。

There was only one survivor of the plane crash.

这次飞机失事中只有一名幸存者.

Not only that, soybean production is down from year's record high.

不仅如此, 大豆的产量自去年达到最高水平后开始下降.

Certainly, this is only that a general man's psychology reacts.

当然, 这只是一般男人的心态反应.

She saw only that he was quiet and unobtrusive, and she liked him for it.

她只知道他沉静而谦逊, 并因此而喜欢上他.

I've done only that much.

我所做的就这么多.

'No, sir,'replied the captain;'only that he's too familiar.'

“ 不是, 先生, ” 船长说, “ 我只是说他太随便了. ”

His blanket was wet , but he knew only that he was hungry.

饥饿驱使他往前,直至夜幕降临.

Not only that he has also as party chief.

不仅如此,他还当上了队长.

I should come, only that I'm ill.

要不是因为我病了,我就来了.

Only that they'd been accused of a crime and sent to prison.

只是说他们被控犯罪并被送进监狱.

He would die gladly , so only that S . Behrman died before him.

只要斯·贝尔曼比他早死,他自己也情愿死.

Of Arbaces, they heard only that he still lived; stretched on the bed of suffering.

关于阿耳巴刻斯, 他们只听说他还活着, 缠绵在病榻上.

I should like to go, only that I am ill.

要不是我有病,我倒是很想去.