1
chlorine is used to do sth
说明化学物质的常见用途时，常用 be used to do 结构。
Chlorine is used to kill bacteria in swimming pools.
氯被用来杀死游泳池中的细菌。
氯
chlorines — plural of chlorine
先理解核心含义，再看它在真实句子里的用法。
氯
a nonmetallic halogen element (Cl) that is a yellow-green toxic gas, used to purify water and as a bleaching agent and disinfectant
Chlorine is used to kill bacteria in swimming pools.
氯被用来杀死游泳池中的细菌。
A toxic, green, gaseous chemical element (symbol Cl) with an atomic number of 17.
一种常见的非金属元素,属于卤素；以重黄色刺激性有毒气体闻名；用于净化水和作为漂白剂和消毒剂；自然界中仅以盐的形式存在(如海水中)
a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)
A single atom of this element.
A chlorine-based bleach or disinfectant.
The pool requires a small amount of chlorine to kill bacteria.
游泳池需要少量氯来杀灭细菌。
Workers added chlorine to the city's water supply to make it safe to drink.
工人们向城市供水系统中加入氯，使其可以安全饮用。
Chlorine is a yellow-green gas at room temperature.
氯在室温下是一种黄绿色气体。
说明化学物质的常见用途时，常用 be used to do 结构。
Chlorine is used to kill bacteria in swimming pools.
氯被用来杀死游泳池中的细菌。
add chlorine to 后接容器或水体，表示“向……加氯”。
Remember to add chlorine to the hot tub.
记得往热水浴缸里加氯。
用 there be 句型表示某处存在氯。
There is chlorine in most tap water.
大多数自来水里都含有氯。
Not this
There are chlorines in the swimming pool.
Use this
There is chlorine in the swimming pool.
chlorine 指氯这种物质时为不可数名词，不能加复数 -s 并使用复数谓语；应改用单数不可数形式，谓语用 is。
Not this
The water is chlorine.
Use this
The water is chlorinated.
chlorine 是名词，不能直接作表语形容词来描述水经过氯处理的状态；应使用过去分词 chlorinated 表示“经氯消毒的”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
氯气
Chlorine gas is highly toxic and was used as a weapon in World War I.
氯气有剧毒，在第一次世界大战中曾被用作武器。
氯漂白剂
Use chlorine bleach to remove stains from white cotton clothes.
使用氯漂白剂去除白色棉质衣物上的污渍。
二氧化氯
Chlorine dioxide is used to disinfect drinking water.
二氧化氯用于对饮用水进行消毒。
氯片
Add chlorine tablets to the swimming pool every week.
每周向游泳池中加入氯片。
氯原子
A chlorine atom can combine with a sodium atom to form salt.
一个氯原子能与一个钠原子结合形成盐。
无氯的
Many parents choose chlorine-free diapers for their babies.
许多家长为宝宝选择无氯纸尿裤。
啜饮着纯氯。
From the song 'Chlorine' by Twenty One Pilots (2018), where the singer uses the image of drinking chlorine as a metaphor for coping with a toxic, addictive habit.
出自Twenty One Pilots 2018年的歌曲《Chlorine》，歌手以饮用氯的形象比喻应对一种有害的、令人上瘾的习惯。
Use chlorines naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
看到chlorine开头的Cl，正好是氯的元素符号Cl，记住它就是氯。
语域：neutral 常见场景：化学实验室、水处理及消毒 通常作不可数名词，泛指氯这种化学元素或其消毒用途，多用于化学、水处理和泳池卫生等场景。
没有与 chlorine (/ˈklɔrin/) 严格押韵的常用词。fluorine、bromine、iodine 都与 chlorine 以 -ine 结尾，但重音或元音不同，并不押韵；chloride、machine、line 是常见易混词，注意 -ine 在 machine 中读 /iːn/、在 line 中读 /aɪn/。
Dictionary facts from ECDICT, WIKTIONARY.