halons

/ˈheɪlɒnz/ /ˈhælənz/

Meanings

noun

卤代烷烃，卤化烃。

A hydrocarbon in which one or more hydrogen atoms have been replaced by halogens

Examples :

"Many older fire extinguishers contained halons, which were very effective at putting out fires but damaged the ozone layer. "

许多老式灭火器含有卤代烷烃 (halons)，这种物质灭火效果非常好，但会破坏臭氧层。

Related Words

replaced verb

/ɹɪˈpleɪst/

放回，归位

"After I finished reading the book, I replaced it on the shelf. "

我看完书后，把它放回了书架上。

damaged verb

/ˈdæmɪdʒd/

损坏，毁坏，破坏。

"Be careful not to damage any of the fragile items while unpacking them."

小心，拆包裹的时候别把这些易碎品弄坏了。

hydrocarbon noun

/ˈhaɪdroʊˌkɑːrbən/ /ˈhaɪdrəˌkɑːrbən/

碳氢化合物，烃。

"Gasoline is a hydrocarbon fuel used in many cars. "

汽油是一种碳氢燃料，很多汽车都在使用。

hydrogen noun

/ˈhaɪdɹədʒ(ə)n/ /ˈhaɪdɹədʒən/

氢，氢气。

"Hydrogen is the simplest chemical element, with only one proton in its atom. "

氢是结构最简单的化学元素，它的原子中只有一个质子。

halogens noun

/ˈhælədʒənz/ /ˈheɪlədʒənz/

卤族元素, 卤素。

"Table salt, or sodium chloride, is formed when the metal sodium reacts with chlorine, one of the halogens. "

食盐，也就是氯化钠，是金属钠与氯气反应形成的，而氯气是卤族元素的一种。

contained verb

/kənˈteɪnd/

包含，容纳。

"The box contained old photographs. "

这个盒子里装着一些旧照片。

putting verb

[ˈpʰʊɾɪŋ] /ˈpʌtɪŋ/

放置，安放

"She put her books on the table."

她把书放在了桌子上。

effective noun

/əˈfɛktɪv/

精兵, 战士

"The new recruit was a strong and effective soldier, ready for basic training. "

这个新兵身体强壮，是个能上战场的精兵，已经准备好参加基础训练了。

which pronoun

/wɪt͡ʃ/

哪个，哪些

"By now, you must surely know which is which."

到现在，你肯定应该知道哪个是哪个了吧。

older adjective

/ˈəʊldə/ /ˈoʊldɚ/

更老的，较旧的

"an old abandoned building; an old friend"

一栋废弃的旧楼; 一位认识很久的老朋友

extinguishers noun

/ɪkˈstɪŋɡwɪʃərz/ /ɛkˈstɪŋɡwɪʃərz/

灭火器，救火筒

"The extinguishers in the hallway are checked regularly to ensure they work in case of a fire. "

走廊里的灭火器会定期检查，以确保发生火灾时能够正常使用。

atoms noun

/ˈatəmz/

原子

"The air we breathe is made of tiny atoms like oxygen and nitrogen. "

我们呼吸的空气是由微小的原子构成的，比如氧原子和氮原子。