1
be harmful to sb/sth
Smoking is harmful to your health.
吸烟对你的健康有害。
有害的
先理解核心含义，再看它在真实句子里的用法。
有害的
Causing or likely to cause harm or damage.
Smoking is harmful to your health.
吸烟对你的健康有害。
有害的；造成伤害的。
Causing or likely to cause harm or damage; injurious.
造成或能够造成伤害的；有害的
causing or capable of causing harm
Exposure to harmful chemicals can cause serious health problems.
接触有害化学物质会导致严重的健康问题。
AI contextual example
This plastic is not harmful to the environment because it biodegrades quickly.
这种塑料对环境无害，因为它能快速生物降解。
AI contextual example
The doctor warned that too much screen time can be harmful to your eyes.
医生警告说，长时间看屏幕可能对眼睛有害。
AI contextual example
too much sun is harmful to the skin
过多的日晒对皮肤有害
WordNet
Smoking is harmful to your health.
吸烟对你的健康有害。
The harmful effects of pollution are well known.
污染的害处是众所周知的。
This product contains no harmful chemicals.
该产品不含任何有害化学物质。
Not this
Smoking is harmful for health.
Use this
Smoking is harmful to health.
形容词 'harmful' 后接介词 'to' 表示 '对……有害'，而不要受中文 '对……有害' 的影响误用 'for'。
Not this
This chemical can harmful to the environment.
Use this
This chemical can be harmful to the environment.
'harmful' 是形容词，在情态动词后必须与系动词 'be' 连用构成谓语，不能直接作谓语。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
有害影响
The harmful effects of smoking are well known.
吸烟的有害影响是众所周知的。
有害物质
This product contains no harmful substances.
该产品不含有害物质。
有害细菌
Wash your hands to remove harmful bacteria.
洗手以去除有害细菌。
有害化学品
Avoid exposure to harmful chemicals in the workplace.
避免在工作场所接触有害化学品。
有害行为
Bullying is harmful behavior that should be stopped.
欺凌是有害行为，应该被制止。
有害影响
The project had a harmful impact on the environment.
该项目对环境产生了有害影响。
Use harmful naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
harm（伤害）加上-ful，记忆：‘harm’就是‘害’，所以‘harmful’是‘有害的’。
中性语域，常用于健康警告、环境讨论、产品说明及日常抱怨等场景。
harmful 后面常接介词 to。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.