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an ethicist
ethicist 是可数名词，指专门研究伦理学的哲学家。
She is an ethicist.
她是伦理学家。
伦理学家
先理解核心含义，再看它在真实句子里的用法。
伦理学家
a philosopher who specializes in ethics
She is an ethicist.
她是伦理学家。
研究伦理学的人,尤指哲学家。
A person, especially a philosopher, who studies ethics (principles governing right and wrong conduct).
倡导特定道德准则的人。
A person who advocates a particular set of principles governing right and wrong conduct.
The hospital asked an ethicist to help the committee decide whether to continue the treatment.
医院请了一位伦理学家来帮助委员会决定是否继续治疗。
As an ethicist, she often gives talks about honesty in scientific research.
作为一名伦理学家，她经常就科学研究中的诚信问题发表演讲。
The university hired two ethicists to review the new data policy.
这所大学聘请了两位伦理学家来审查新的数据政策。
ethicist 是可数名词，指专门研究伦理学的哲学家。
She is an ethicist.
她是伦理学家。
who 引导的定语从句说明伦理学家从事的领域。
An ethicist who studies technology can help companies make better decisions.
研究科技的伦理学家可以帮助公司做出更好的决策。
as an ethicist 表示以伦理学家的身份或职业。
She works as an ethicist for a nonprofit organization.
她在一家非营利组织担任伦理学家。
Not this
She is ethicist.
Use this
She is an ethicist.
中文没有冠词，英语中可数名词单数前需要不定冠词；ethicist以元音音素开头，所以用an。
Not this
The ethicist of this decision is questionable.
Use this
The ethics of this decision are questionable.
要表示“伦理、道德层面”应用不可数名词ethics，而不是指人的名词ethicist。ethicist是“伦理学家”，ethics是“伦理”，词性和意义不同。
Not this
He is a famous ethicists.
Use this
He is a famous ethicist.
不定冠词a后应搭配名词单数形式。ethicists是复数，应去掉s恢复单数ethicist。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
职业伦理学家
She works as a professional ethicist for a hospital.
她在一家医院担任职业伦理学家。
医学伦理学家
The medical ethicist advised against the experimental treatment.
医学伦理学家建议不要采用这种实验性治疗。
商业伦理学家
A business ethicist helps companies design fair policies.
商业伦理学家帮助企业制定公平的政策。
知名伦理学家
The conference featured several leading ethicists.
会议邀请了多位知名伦理学家参加。
伦理学家主张
The ethicist argues that honesty is the foundation of trust.
这位伦理学家主张，诚实是信任的基础。
Use ethicist naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 ethic（伦理）和 -ist（表示人）联想在一起：研究伦理的学者就是 ethicist 伦理学家，就像 scientist 是科学家。
语域：formal 常见场景：academic writing、professional ethics discussions 通常用于正式场合，多见于学术或专业伦理讨论，口语中较少使用。
ethicist 指专门研究伦理学的哲学家，不是泛指有道德的人。
Dictionary facts from ECDICT, WIKTIONARY.