become an environmentalist
become 后接可数名词单数时，前面要用不定冠词 an；表示身份、职业的转变。
She became an environmentalist after studying the effects of pollution.
研究了污染的影响之后，她成为了一名环保主义者。
环保主义者；环境保护主义者
environmentalists — plural of environmentalist
环境决定论者；倡导通过生态系统保护、减少浪费和防止污染来保护环境和生物圈的人；致力于保护环境免受破坏或污染的人；认为环境而非遗传或文化是个体或群体发展的主要因素的人；环保人士
a person who advocates or works to protect the environment from pollution and destruction
倡导通过生态系统保护、减少浪费和防止污染来保护环境和生物圈的人
One who advocates for the protection of the environment and biosphere from misuse from human activity through such measures as ecosystem protection, waste reduction and pollution prevention.
致力于保护环境免受破坏或污染的人
someone who works to protect the environment from destruction or pollution
认为环境而非遗传或文化是个体或群体发展的主要因素的人
One who holds the view that environment, rather than heredity or culture, is the primary factor in the development of an individual or group.
The environmentalist gave a talk about reducing plastic waste at our school.
那位环保主义者在我们学校做了一场关于减少塑料垃圾的讲座。
用法提示：environmentalist 是名词，在句中作主语，指“环保主义者”。
Many environmentalists are calling for stronger laws to protect forests.
许多环保主义者呼吁制定更有力的法律来保护森林。
用法提示：environmentalists 是 environmentalist 的复数形式，在句中作主语。
She joined a group of environmentalists who clean up the beach every weekend.
她加入了一群每周都清理海滩的环保主义者。
用法提示：environmentalists 是复数名词，在句中作介词 of 的宾语。
become 后接可数名词单数时，前面要用不定冠词 an；表示身份、职业的转变。
She became an environmentalist after studying the effects of pollution.
研究了污染的影响之后，她成为了一名环保主义者。
as + 单数名词用来说明某人的身份或立场，常置于句首。
As an environmentalist, he opposes the new dam.
作为一名环保主义者，他反对这座新水坝。
复数形式 environmentalists 指某一群体，后面可用 who 引导的定语从句加以限定。
Environmentalists who campaign against plastic waste welcomed the ban.
那些反对塑料垃圾的环保主义者对这一禁令表示欢迎。
grammar · medium
易错句子She is environmentalist.
正确表达She is an environmentalist.
environmentalist 是可数名词，单数形式指“一个人”，前面必须有不定冠词。汉语名词前没有冠词，所以容易整句漏掉；表示身份时要说 an environmentalist。
grammar · medium
易错句子He is a environmentalist.
正确表达He is an environmentalist.
不定冠词的选择看后接词的起始音素，而不是首字母。environmentalist 以元音音素 /ɪ/ 开头，所以用 an，不用 a。
grammar · medium
易错句子The government should deal with environmentalist pollution.
正确表达The government should deal with environmental pollution.
environmentalist 是名词，指“环保主义者”这个人；修饰 pollution 这类名词表示“与环境有关的”时，要用形容词 environmental。两者拼写相近但词性和意义不同，不能互换。
著名的环保主义者
She is a leading environmentalist who has campaigned against plastic waste for decades.
她是一位著名的环保主义者，数十年来一直致力于反对塑料垃圾。
坚定的环保主义者
He is a committed environmentalist and cycles to work every day.
他是一位坚定的环保主义者，每天骑自行车上班。
激进的环保主义者
Radical environmentalists sometimes take direct action to stop logging.
激进的环保主义者有时会采取直接行动阻止伐木。
环保团体
Environmentalist groups welcomed the new limits on emissions.
环保团体对新的排放限制表示欢迎。
成为环保主义者
She became an environmentalist after studying how pollution harms wildlife.
在研究污染如何危害野生动物之后，她成为了一名环保主义者。
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终身的环保主义者
My grandfather was a lifelong environmentalist who planted trees every spring.
我的祖父是一位终身的环保主义者，每年春天都种树。