not 四级六级

I expect not.; I don't expect so.

我认为不会。

Don't waste the flour; there isn't much.

不要浪费面粉，没有多少了。

I oughtn't to do that, it's not ethical.

我不该做那件事，它不合乎道德的。

If the hen does not prate,she will not lay.

母鸡不唠叨不下蛋。

Don't scold the child.It's not his fault.

别责怪那孩子, 那不他的过错。

In conversational English “is not” often contracts to “isn't”.

口头英语中is not常缩写为isn't。

In conversational English “is not” often contracts to “isn’t”.

英语口语中is not常缩写为isn’t。

Motherhood doesn't suit her; she shouldn't have had children.

"她不宜做母亲,她不该生孩子。"

I don't care two pins whether she comes or not.

她来不来, 我不在乎。

I didn't flunk but I didn't do too well.

我没有不及格，不太好。

If the virus cannot replicate itself, it cannot cause illness.

如果病毒不能变异，也就不能够诱发疾病了。

That doesn't mean I don't get to kibitz a lot.

当然这并不意味着我就不能发表意见了。

Although she did not reciprocate his feelings, she did not discourage him.

尽管她没有回应他的感情，她也没有使他丧失信心。

That chair's not very robust; don't sit on it.

那把椅子不太结实, 别坐它了。

I wish you wouldn't mumble - I can't hear you clearly.

我希望你说话不要含含糊糊 - 我听不清你在讲什么。

What the eye does not see, the heart does not grieve over.

眼不见, 心不烦。

Don’t look at me! I didn’t say a dicky bird.

别看我！我什么也没说。

Objective To investigate the immunofluoresce nt and immunoblotting features of paraneoplastic pemphigus(PNP).

目的研究副肿瘤性天疱疮患者的免疫学特点。

"They didn't flunk out, but their records weren't so hot."

"他们勃没有不及格,成绩不太好。"

He didn’t flunk out,but his record isn’t so hot.

他没有不及格,成绩很一般。