"buoyancy" in Chinese (Simplified)
浮力
Definition
物体在水或其他液体中漂浮的能力；也指一种愉快或乐观的心情。
Usage Notes (Chinese (Simplified))
常用于科学（物理、化学），特别是有关液体时。也可用于比喻积极的心态。“buoyant”是形容词形式，不要与“buoy”（浮标）混淆。
Examples
The buoyancy of the ball let it float on the water.
球的**浮力**让它漂浮在水面上。
Fish use their buoyancy to move up and down in the water.
鱼利用**浮力**在水中上下移动。
Salt water gives greater buoyancy than fresh water.
盐水比淡水有更大的**浮力**。
Her natural buoyancy helped her stay positive during hard times.
她天生的**乐观**让她在困难时期保持积极。（Note: Usually translated as “乐观” in this sense）
Life jackets increase your buoyancy and keep you safe in the water.
救生衣能增加你的**浮力**，让你在水中更安全。
The scientist studied how temperature affects buoyancy in different liquids.
科学家研究了温度如何影响不同液体的**浮力**。