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Methane and propane are alkanes.是什么意思？

Methane and propane are alkanes.

甲烷和丙烷是烷烃。

相关词汇
methane and propane are alkanes

methane

n. <化>甲烷，沼气；
例句
A methane molecule is composed of one carbon atom attached to four hydrogens.
甲烷分子由1个碳原子与4个氢原子构成。

and

conj. 和，与，而且，于是，然后，因此；
例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

propane

--
例句
Methane and propane are alkanes.
甲烷和丙烷是烷烃。

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；
例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

alkanes

烷类；
例句
The general uses of alkanes may be divided into three categories.
烷的一般用途可分为三个方面.
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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。
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Nick looked back over his shoulder and then stopped, frowning...
尼克回头看了看，又皱着眉头停了下来。
to issue an ultimatum
发出最后通牒
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寂静中叮当作响的餐具
The new proposals have won the approval of the board.
新建议得到董事会的认可。
The Great Pyramids and the Sphinx are nearby.
雄伟的金字塔和狮身人面像就在附近.
She dances with an exquisite fluidity of movement.
她的舞姿细腻流畅。
And so the sacred feminine was demonized and called unclean.
所以神圣的女性被妖魔化,而被称为不洁.
...charts of Greek waters.
希腊海域图
The dinner set me back 50 dollars.
晚饭花了我50美元。
an outbreak of food poisoning
食物中毒事件