不然

Either be there on time, or don't go at all.

要去就别迟到, 不然,就甭去了.

Don't go too far afield or you'll get lost.

别走得太远,要不然你会迷路的.

Why did you need a room unless you were up to something?

除非你要搞什么小动作，不然你为什么单要一间房？

Let's go right now before it gets too late.

我们马上就去,不然就太晚了.

Anhydrous ammonia must be incorporated ( and well sealed ) in all crops.

在夏季作物上施用尿素,把尿素和土壤掺混 施用 有好处,但在冬季作物上则不然.

Don't bear hard upon the pencil, it will break.

别使劲压铅笔, 不然会断.

The book must be here, or else you've lost it.

书一定在这, 要不然就是你把它丢了.

I need to let off steam or I'll go crazy!

我必须发泄一下,不然我就要疯了.

Others may be fond of titles and honours, but I am not.

人皆好名, 我则不然.

Close the screen or the flies will get into the house.

把纱门关起来,不然苍蝇会飞进屋来.

Don't rush him or he'll become confused.

不要催他，不然他会犯糊涂的。

You must make a choice between Mary and Lily, or you'll fall between two stools.

你必须在玛莉和莉莉之间作出选择, 不然你会失去两人.

eg ： We'll go early, otherwise we may not get a seat.

do things right：正确地做事otherwise作连词，意为“否则；不然”，相当于or或if not我们得早点去，要不然就没有座位了。

Don't rush into marriage; you might regret it later.

不要匆匆忙忙结婚, 不然 你以后也许要后悔的.

A cheap bed can be a false economy.

便宜的床看似省钱，其实可能不然。

Again, if you want to have a homepage, Do It Yourself.

不然?假如你只是想有网址的话?那就请自便吧.

Alternatively, they crack down so hard on inflation that they force their economies into recession?

要不然他们会宁愿经济衰退而下定决心打击通胀 吗 ?

Don't be mean with fabric, otherwise curtains will end up looking skimpy.

别这么吝啬布料，不然做出来的窗帘会显得特寒酸。

Don't give me any aggro or I'll call the police!

你别找茬儿闹事,要不然我就叫警察了!

Some of the studies show positive results, whereas others do not.

有一些研究结果令人满意，然而其他的则不然。

Don't say it serves me right or I'll thump you.

别说我活该，不然让你尝尝我的拳头。

You'd better watch out, or you'll be getting done in.

你还是当心点好, 不然你会上当受骗.

Hope it's not too big bring on piles again.

但愿块头不要太大,不然,痔疮又会犯了.

In case you should die and can't pay the alimony and legal fees.

不然万一你死了,你就付不了抚养费和其它法定费用了.

You must urge the children on or we'll never get home.

你必须催促孩子们赶路,不然我们永远也到不了家.

Do not offend me, otherwise I one fist hits you very abstractly.

你别惹我, 不然我一拳把你打得很抽象.

Lace your boots firmly or the lace will come undone.

把你的靴子系紧,不然鞋带会松开.

Sometimes it makes sense; sometimes it doesn't; sometimes not talking can be appeasement.

与敌对话有时颇有意义, 有时则不然; 有时拒绝对话就是采取绥靖政策.

Don't give me any aggro or I'll call the police.

不要对我使用暴力，不然我就叫警察。

Keep quiet or we'll all get nicked.

别出声，要不然我们都会被抓住的。