The lesson was not clear and it has muddled me.

这一堂课不清楚，把我给搞糊涂了。

It is unclear whether the meeting will go ahead as planned.

会议否会如期举行还不清楚。

I am happy to clarify any points that are still unclear.

我愿意说明任何仍然不清楚的地方。

I had no idea of the gaffe which I was committing.

我不清楚我犯了什么错误。

It's not clear,the steel at point seems to be intact and plumpy.

看不太清楚,好象刀尖夹钢完整而丰满啊.

The instructions in the manual are as clear as mud.

使用手册上的说明一点也不清楚。

The final letter is very vague; possibly an R or a K.

最后一个字母很不清楚, R, 也K。

This sentence is ambiguous in sense.

这个句子意思不清楚。

An open verdict was the only appropriate one, given the very unclear evidence at the inquest.

查发现的证据十分不清楚，只有疑判决才恰当。

I wot that but too well.

我并不很清楚那件事。

Scrotal calcinosis: Is the cause still unknown?

病因否仍不清楚?

The house is hers as of right but it is not clear who owns the furniture and paintings.

这所房子她的合法财产，但傢具和画的归属却不清楚。

His reasons remain obscure.

他的理由不清楚。

I'm still hazy about it.

我对此仍不清楚。

Badly worn type prints poorly.

磨损的活字印得不清楚。

According to Van Cauter, the mechanism may have to do with a small area in the brain where neurons respond to both eating and sleeping.

考特说，这种与缺乏睡眠有关的激素变化的确切原因还不清楚，这种机制与大脑中某个区域有关，在这个区域中神经元对饮食和睡眠都会反应。

It was a little boat, oarless, or not visibly propelled, and in it were her mother, and Vesta, and some one whom she could not make out.

那一只很小的船，旁边没有桨，也不见它移动，船中坐着她的母亲和味丝搭，还有一个人却辨不清楚。

It was reported that the detwinning stress in martensite of Ti-Ni alloys increases with increasing annealing temperature, but the reason for such a strange behavior has remained unclear.

有报道称Ti-Ni合金的去孪晶应力随着退火温度的升高而升高，但造成这一现象的原因并不清楚。

Attractive and 'Pilfer-Proof' - A stapled box leaves a clear, unmarred surface;no part of the box is obscured (especially print) and the box achieves its function as a messenger.

引人注目和防盗-钉合以给人留下干净的，无损坏的外表，没有表面被覆盖或者不清楚（特别印刷的盒子），并且盒子以更好地传递视觉的信息。