children learning addition and subtraction

Cyadox was synthesized from benzofurazan by three steps including Beirut reaction , Redox reaction and Addition reaction.

喹赛多的合成路线:以苯并呋咱一氧化物为起始原料,经过贝鲁特缩合 、 氧化还原反应、西佛碱反应三步反应合成目标产物.

Michael reaction is a typical nucleophilic addition reaction, is always an organic chemistry domain research spot.

迈克尔反应是一个典型的亲核加成反应, 一直是有机化学领域的一个研究热点.

This is sth. additional.

这是外加的东西。

Additional police have been ordered out to control the expected crowds.

已增派了一些警察到那些会出现人群的地方去维持秩序.

I have one lock but I bought another as an additional insurance against thieves.

我有一把锁,可是另外又买了一把作为附加的防盗保障.

He wrote in an additional paragraph at the editor's request.

他应编辑的要求插入了一小段加写的文章.

You have to insert an additional piece of material into the waistline of the dress to make it large enough for her.

你还得添块布料加宽这件女装的腰部,这样她穿上就合身了.

Can you type the additional figures in at the bottom of the page?

你能在这页下面再加上这些数字 吗 ?

The two equal winners had to play off an additional game to decide the winner of the whole competition.

并列的那两名优胜者还要进行加赛以决定整个比赛的优胜者.

Passengers have to pay additional charges for their extra luggages.

旅客们超量携带的行李要额外付费.

The rate is 10 yuan for the first three kms and 1.6 yuan for each additional km.

收费率是前3公里10元,之后再加一公里收1.6元.

He overextended himself when he accepted the additional assignment.

当接到额外的任务时,他过度紧张.

Additional powers will devolve to the regional governments.

将向地方政府下放更多的权力.

It is necessary to set down these additional rules.

有必要制定这些补充规则.

An additional, unstated reason for his resignation may have been a lawsuit filed against him.

他辞职的另一个没有言明的理由可能是他遭到了起诉。

The builders will have to strengthen the existing joists with additional timber.

施工人员将不得不另外用木料加固现有的托梁。

The blanket will provide additional warmth and comfort in bed.

毛毯能让你睡得更温暖、更舒适。

A stepfamily faces all the problems that a normal family has, with a set of additional problems on top.

再婚家庭会面临正常家庭的所有问题，外加一堆额外难题。

With the blessing of the White House, a group of Democrats in Congress is meeting to find additional budget cuts.

在白宫的支持下，一群民主党国会议员将开会寻求进一步缩减预算。

For additional information, contact any of the above.

如需更多信息，可与以上任何一处联系。