not 四级六级

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

我认为会。

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

要浪费面粉，没有多少了。

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

我该做那件事，它合乎道德的。

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

母鸡唠叨下蛋。

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

别责怪那孩子, 那他的过错。

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.

"她宜做母亲,她该生孩子。"

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

她来来, 我乎。

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

我没有及格，但考得。

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

如果病毒能变异，也就能够诱发疾病了。

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

当然这并意味着我就能发表意见了。

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.

那把椅子结实, 别坐它了。

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

我希望你说话要含含糊糊 - 我听清你讲什么。

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

眼见, 心烦。

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."

"他们勃没有及格,但成绩。"

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

他没有及格,但成绩很一般。