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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。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
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。
相关例句
I tipped the porter 50p.
我给了搬运工人50便士小费。
Humans have monopolized nearly all of the world's natural resources.
人类几乎已经垄断了地球的一切资源.
I was regaled with the scaly tips of the drumsticks of the fowls.
给我吃的全是带着鳞皮的鸡爪子.
He is not yet well enough to dispense with the doctor's services.
他尚未痊愈,仍需医生照看.
He is an accomplished musician.
他是个有造诣的音乐家。
...a vote of sixteen in favor, three against, and one abstention...
16票赞成、3票反对、1票弃权
A guest should suit the convenience of the host.
客随主便。
If prosecutorial misconduct results in a mistrial, a later prosecution may be barred.
如果检察官的不轨行为导致审判无效, 再行起诉可能会被除数禁止.
Unions pledged to fight any compulsory redundancies 'tooth and nail'.
工会许诺会“竭尽所能地”阻止任何强制裁员。
His analysis was always shallow.
他的分析总是很肤浅的。