Buoyancy
01
浮力, 轻盈
the property of something weightless and insubstantial
02
乐观, 自信
a feeling of hopefulness and confidence that makes one remain cheerful, especially in sad or unpleasant situations
03
浮力, 阿基米德原理
the tendency of an object to float or rise in a fluid, like water or air, due to the upward force exerted by the fluid
例子
Life jackets rely on buoyancy to keep people safe in water.
救生衣依靠浮力来确保人们在水中的安全。
Hot air balloons use buoyancy to lift into the sky.
热气球利用浮力升入天空。
04
欢快, 快乐
cheerfulness that bubbles to the surface
