He likes sitting in the back of the class.

A quiet murmur passed through the classroom.

一阵悄悄的低语声传遍了整个教室。

How many schoolrooms are there in this college?

这所大学里有多少教室?

GIBSON PRAISE walks into one of the schoolrooms.

(吉普森普雷兹走近一间教室. )

Study on DNA extracted from cigarette butts

烟蒂DNA分型的研究

I've already seen two cigarette butts.

我已经看见两烟头了。

Method Chelex 100 extraction method was used to extract DNA of 170 cigarette butts, STR loci were typed after PCR amplification by Profiler Plus kit.

方法用Chelex-100法提取170枚烟蒂样本的DNA，进行PCR扩增及STR检验。

Those cigarette butts from the crime scenes.

犯罪现场找到的那些烟头。

Objective To study the DNA extraction and its typing in cigarette butts.

目的研究烟蒂中DNA提取及其检验。

Somebody makes a work of art which consists of a lot of cigarette butts and the janitor just throws it away.

有人制造了一个艺术品，这艺术品包括看门人刚刚扔掉的许多香烟头。

Municipal workers collect more than 150 tons of cigarette butts every year in Paris.

市政工人每年在巴黎可以收集到超过150吨的烟头。

Residue ( cigarette butts, ashes, etc.) discarded in labeled receptacles.

残余物（烟头，烟灰等）弃置于有标记的容器内。

On Monday night, the floor in the dimly lit lobby was strewn with cigarette butts.

本周一晚记者访问这家酒店时发现，酒店大厅灯光昏暗，地板上散落着烟头。

Cigarette butts were classified into three categories: legal, contraband or unknown.

烟蒂被分为三类：合法的、走私的或不知名的。

Because birds that decorate their digs with discarded cigarette butts are less bothered by parasites.

因为鸟类会用被丢弃的烟蒂来装饰鸟巢，而且它们受寄生虫的困扰较少。

Others, like mine, have cracks, banana skins and cigarette butts.

有些，就像我，有裂缝，有香蕉皮，有烟蒂。

Therefore, it is very urgent to prevent fire accidents caused by cigarette butts efficiently through enhancing the people's awareness on fire prevention, especially the smokers'.

因此，迫切需要通过提高广大人民群众，尤其是烟民的消防安全意识，以期有效预防烟头火灾事故的发生。

Not littering at all or cleaning up litter, such as cigarette butts and plastic bags, greatly improves the quality of our environment.

不要乱扔垃圾或者将烟头和塑料袋子等垃圾收拾好都可以大大改善我们的生活。

By getting rid of the sticky carpets and the cigarette butts

摆脱了黏地毯和烟蒂

Some are well paved. Others, like mine, have cracks, banana skins and cigarette butts.

有些很整洁，还有的，像我一样，有裂缝，香蕉皮和烟头。

A receptacle for tobacco ashes and cigarette butts. He picked up the ash tray and put it on the table.

烟灰缸，烟灰盘装烟灰与烟蒂的容器他拾起烟灰缸，放到桌上。