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他们对放热的化学反应一无所知.用英语怎么说？

他们对放热的化学反应一无所知.

They know nothing about exothermic chemical reactions.

相关词汇
they know nothing about exothermic chemical reactions

they

pron. 他/她/它们，人们，大家，政府，当局，她们；
例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

know

v. 知道，了解，认识，确信；n. 知情；
例句
I know you're above me socially, but I must say I find your attitude offensive...
我明白你的社会地位比我高，但我得说我觉得你的态度很粗鲁。

nothing

pron. 没有东西，没有事情，无关紧要的东西，毫无趣味的事；n. 无关紧要的人[事]，零，无；adv. 毫不，决不；
例句
I have nothing against foreigners.
我对外国人并无芥蒂。

about

prep. 关于，大约，在…周围；adv. 大约，在附近，在四周，几乎；adj. 在附近的，四处走动的，在起作用的，在流行中的；
例句
The helicopter can zip along at about 150 kilometres an hour.
该直升机能以每小时150公里左右的速度疾进。

exothermic

adj. 发热的，放出热量的；
例句
Is Hell exothermic ( gives off heat ) or endothermic ( absorbs heat )?
地狱是散 发热量 还是吸收热量?

chemical

adj. 化学的，用化学方法制造的，化学作用的；n. 化学药品，化学制品；
例句
The chemical companies had amalgamated into a vast conglomerate...
那些化学品公司已经合并成一个庞大的企业集团。

reactions

n. 反应( reaction的名词复数 )，反动，反对，反作用力；
例句
Soya milk can cause allergic reactions in some children.
有些孩子会对豆浆过敏。
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
Supporters of the death penalty argue that it would deter criminals from carrying guns...
死刑的支持者认为它能阻吓罪犯携带枪支。
相关例句
There is a general presumption that the doctor knows best.
一般人都以为医生最了解情况。
a campaign to encourage childless couples to adopt
鼓励无子女夫妇领养孩子的运动
Can they shape public opinion?
他们能左右舆论吗?
This began to distil a sense of fear in Marissa.
这一点开始在玛莉莎心中产生一种恐惧感.
He declined to address the delegates.
他拒绝向代表们发表讲话。
The Foreign Secretary's remarks clarify an ambiguous statement issued earlier this week.
外交大臣的话对本周较早时候发表的一份模棱两可的声明作出了澄清。
Daylight quenches the candles and the birds begin to sing.
日光压倒了烛光,小鸟开始歌唱.
There is a cameo appearance by the sea serpent.
电影里,海蛇偶然出现.
The king said there was now a window of opportunity for peace.
国王说现在有寻求和平的短暂机会。
It incorporated proline directly, and hydroxylated It'subsequently in a manner reminiscent of collagen.
它直接将脯氨酸并入, 并且随后象骨胶那样使它羟基化.