are

The frontiers of medical knowledge are being pushed farther outwards as time goes on.

医学知识域正随着时间推移而向前推进。

Although they are poor they are happy.

虽然他们很穷，但很快乐。

Cook the lentils until they are mushy.

把扁豆烧到呈烂糊状为止。

Markets are flourishing and prices are stable.

市场繁荣, 物价稳定。

He does not know what nerves are.

他不知道什么叫害怕。

Children wriggle themselves when they are bored.

小孩子感到厌烦时就会扭动他们身体。

I cannot conjecture what his plans are.

我拿不准他计划是什么。

Matches will not strike if they are damp.

火柴潮湿就擦不着。

Researchers believe that they are onto something big.

研究人员认为他们将有重大发现。

The table is shaky because the braces are loose.

这张桌子摇摇晃晃, 因为支架全松了。

I beg to point out that you are wrong.

恕我指出你错了。

He believes that his supporters are in the majority.

他相信支持他人占多数。

Turf wars are inevitable when two departments are merged.

两个部门合并时总免不了争争权限。

But often these people, these people are fantast forever.

但往往这些人，这些人永远都是梦想家。

It imports little that we are early or late.

我们早到或迟到没什么关系。

Intelligent as you are, I suspect you will fail.

尽管你聪明, 我猜想你会失败。

Young girls sometimes become sulky because they are jealous.

少女们因为嫉妒而有时变得很不高兴。

He will notify us where we are to meet.

他将通知我们在什么地方集合。

Some mushrooms are good to eat; some are poisonous.

有些蘑菇可食用, 有些则有毒。

Oh, is that even rasher than you really are?

啊啊，是不是说得有点太过马虎了？