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corona discharge + verb (occurs/happens)
Corona discharge occurs when the electric field is strong enough.
当电场足够强时，就会发生电晕放电。
电晕放电
先理解核心含义，再看它在真实句子里的用法。
电晕放电
an electrical discharge that occurs when a strong electric field ionizes the surrounding air, often producing a faint glow
Corona discharge occurs when the electric field is strong enough.
当电场足够强时，就会发生电晕放电。
由于强电场导致电流周围空气(或其他流体)的电离
The ionization of air (or any other fluid) surrounding an electrically energized conductor, as a result of a strong electric field.
During the storm, we could see a faint corona discharge around the power line.
暴风雨中，我们能看到电线周围有微弱的电晕放电。
The engineer explained that corona discharge can cause a humming sound near high-voltage cables.
工程师解释说，电晕放电会使高压电缆附近产生嗡嗡声。
Scientists measure corona discharges in the laboratory to study electric fields.
科学家在实验室测量电晕放电，以研究电场。
Corona discharge occurs when the electric field is strong enough.
当电场足够强时，就会发生电晕放电。
High voltage can produce corona discharge around conductors.
高电压可以在导体周围产生电晕放电。
Corona discharge in air is often visible as a faint glow.
空气中的电晕放电通常呈现微弱的辉光。
Not this
The high voltage line is corona discharging.
Use this
The high voltage line is producing a corona discharge.
电晕放电是名词短语，不能直接作动词。应使用 produce/exhibit/generate 等动词加 a corona discharge。
Not this
Corona discharge can occur inside the cable.
Use this
Corona discharge can occur around the cable.
电晕放电发生在导体周围的空气介质中，而非电缆内部。应使用介词 around 或 on the surface of。
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Dictionary facts from ECDICT, WIKTIONARY.