Why Certain Volcanic Ash Clouds Remain Electrified Long After Eruption Ceasing

为何某些火山灰云在喷发停止后仍长期带电

课文音频

Listen to the full story · 完整逐句/整段音频可在解锁后使用。

您仍可先看下方课文摘要；在阅读器可查看该书试读与权益说明。

从第 4 课起，导读页仅展示部分正文，便于您了解难度与风格。

Volcanic plumes generate charge through fractoemission—electron ejection during particle fragmentation—and triboelectric charging during ash collisions.
Fine ash particles (<63 μm) retain charge longer due to high surface-area-to-volume ratios and low settling velocities in turbulent plumes.

Unlock full vocabulary & bilingual guide · 完整课文、逐句音频与全部译文请在解锁学习权益后于阅读器中查看。

解锁学习权益后，您可在导读页继续浏览全课重点词汇、参考译文与语法提示；听全文、逐句点读与查词建议在阅读器中使用。