Grammar Note
lightning 通常作不可数名词，如 a flash of lightning；表示多次闪电时偶用复数 lightnings，但现代英语中很少见。
闪电；闪电的闪光
先理解核心含义，再看它在真实句子里的用法。
闪电；闪电的闪光
a flash of light in the sky caused by an electric discharge, usually during a storm
The lightning lit up the whole sky for a second.
闪电在一瞬间照亮了整片天空。
云中、云间或云与地面之间短时间高电压放电产生的闪光
A flash of light produced by short-duration, high-voltage discharge of electricity within a cloud, between clouds, or between a cloud and the earth.
闪电(云与云之间或云与地之间突然发生的伴随发光的放电现象)
abrupt electric discharge from cloud to cloud or from cloud to earth accompanied by the emission of light
这种放电
A discharge of this kind.
闪光(大气中放电时伴随的闪光,或类似闪光；可持续一秒或更久)
the flash of light that accompanies an electric discharge in the atmosphere (or something resembling such a flash); can scintillate for a second or more
We watched the lightning from the safety of our porch.
我们在门廊的安全处观看闪电。
A flash of lightning struck the old tree in the field.
一道闪电击中了田野里的那棵老树。
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发长 /aɪ/ 音 (如 high, light)
Same pattern, same sound
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lightning 通常作不可数名词，如 a flash of lightning；表示多次闪电时偶用复数 lightnings，但现代英语中很少见。
Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from AI_FALLBACK, ECDICT, WIKTIONARY.