Describes a huge difference or gap between two things; like the difference between heaven and earth.
壤地。天和地，一极在上，一级在下，比喻差别极大。
《抱朴子·内篇·论仙》趋舍所尚，耳目之欲，其为不同，已有天壤之觉（较），冰炭之乖矣。”
The performance of the two students was a difference as vast as between heaven and earth.
Learn the next connected idiom: 天壤之别 (tiān rǎng zhī bié) → 别开生面 (bié kāi shēng miàn)
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