halon

/ˈheɪlɒn/ /ˈhæləʊn/

Meanings

noun

卤代烷

A hydrocarbon in which one or more hydrogen atoms have been replaced by halogens

Examples :

"Old fire extinguishers often contained halon, but it's now being replaced with safer chemicals. "

老式灭火器常常含有卤代烷，但现在正被更安全的化学物质所取代。

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。

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。

being noun

/ˈbiːɪŋ/ /ˈbiŋ/

生物，生命体

"The being in the classroom was quiet today. "

今天教室里的那个生物很安静。

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。

often adjective

/ˈɑf(t)ən/ /ˈɒf(t)ən/ /ˈɔf(t)ən/

经常，频繁。

"My sister is often late for school. "

我妹妹上学经常迟到。

chemicals noun

/ˈkɛmɪkəlz/

化学品，化学物质。

"The science experiment involved mixing several chemicals together to see what would happen. "

这个科学实验需要将几种化学品混合在一起，看看会发生什么。

safer adjective

/ˈseɪfər/ /ˈseɪfə/

更安全，较安全

"You’ll be safe here."

这里你会更安全的。

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。

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。