Unless you're an avid spelunker, or a troglodyte, the answer is probably not too often.

你是一名洞穴探索爱好者或者一名穴居人。

Unless controlled the quality of musical file from fountainhead, otherwise inextricability.

源头上控制了音乐文件的质量，否则无法解决。

There's no use in manufacturing an item unless you can merchandise it.

能够销售得, 否则生产产品就没有价值。

The company is on the ropes; unless the bank extends their loan, they’re finished.

这家公司面临倒闭，如果银行不延长他们的贷款期限，他们就完了。

The colour will not be evenly fixed unless the cloth is first properly wetted out.

如果不把布用水浸透,那么就不会均匀地着色。

Unless a miracle happened, I would be homeless in January, foodless, jobless.

有奇迹现，否则在明年一月我将无家可归，没有吃的，也没有工作。

The firm will head toward bankruptcy unless a new manager is elected.

如果再不选新的经理,这公司就会破产。

Southerners restain threatened to leave the Ujjain at least Union unless southern rights were pretectedprotected.

而南方人则以国家中独立相要挟，继续保留南方人的特权。

Unless we spread our net a bit wider, this company will never get enough business.

如果我们不扩大公司的业务范围，业务量就不够。

This baby seldom cries unless he is tired.

这在疲倦时很少哭。

Unless you go at once you will be late.

如果你不马上走，就会迟到的。

The writing is on the wall for the club unless they can find ￡20 000.

这家俱乐部就要大难临头了， 他们能筹到2万英镑。

They face certain death unless they can be rescued today.

他们今天获救, 否则必死无疑。

"Unless we get more finance, we'll have to close the branch offices."

"如果得不到更多的资金,我们就不得不关闭所有的分支办事处。"

They wouldn't ask for help unless it were a matter of life and death.

是生死攸关的事情, 否则他们不会请求别人帮助。

I shall go there tomorrow unless I'm too busy.

如果我不太忙，明天将到那去。

Let's have dinner out — unless you are too tired.

咱们去吃饭吧——你太累了。

The kidnappers had threatened to behead all four unless their jailed comrades were released.

帮匪们曾经威胁说如果印度方面不释放他们的同伙，他们就要将这四名人质全部斩首。

Say nothing unless you're compelled to.

强迫你，否则什么也别说。

Not I; unless the breath of heartsick groans, mist-like, infold me from the search of eyes.

我不要躲，我心底里发来的痛苦呻吟的气息，会像一重云雾一样把我掩过了追寻者的眼睛。