Why Ice Floats: Hydrogen Bonding, Density Anomalies, and Ecological Consequences

冰为何漂浮：氢键、密度反常及其生态影响

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。

Unlike most substances, solid water is less dense than its liquid phase due to an open hexagonal lattice stabilized by directional hydrogen bonds.
As water cools below 4°C, molecular motion slows enough for hydrogen bonds to lock into stable tetrahedral configurations, increasing volume.

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。