Explanation: an inch of time is an inch of gold. Metaphor time is very precious.
Source: "Huai Nan Zi Yuan Dao Xun": "Therefore, it is rare and easy to lose for a saint to value an inch of yin instead of a foot of jade." Don Wang Zhenbai's Two Poems of Bailudong: "Reading doesn't know the depth of spring, and an inch of time is worth an inch of gold."
Example: ~, hold this thing as a bosom friend. (The second discount of "Zhuang Zhou Meng" in Yuan Dynasty)
Synonym: a moment is worth 1000 dollars.
Antonym: Time flies, time flies.
Grammar: complex sentences; Be the subject and clause; Describe the world as precious.