buoyancy

• 名词，指物体在液体中漂浮或上浮的能力或倾向；引申义指乐观、有活力且能迅速从挫折中恢复的心态。

A noun describing the ability or tendency to float in a fluid, or figuratively, a cheerful and resilient disposition.

不可数

1. Tendency to floatB2formalscientific

   The ability or tendency of an object to float in a liquid or rise in a gas.

   浮力

   • The buoyancy of the life jacket kept him afloat.
   • Salt water increases buoyancy compared to fresh water.
   • The submarine adjusted its buoyancy to dive deeper.

   反义词sinkingsubmersion

2. CheerfulnessC1formal

   A lighthearted, cheerful, and optimistic quality that is hard to suppress.

   乐观开朗

   • Her natural buoyancy lifted the spirits of everyone around her.
   • Despite the bad news, he maintained a remarkable buoyancy.
   • The child's buoyancy was infectious.

   同义词cheerfulnesseffervescencegood humorlightheartednessoptimismsunninessvivacity

   反义词gloompessimism

3. Liveliness and good spiritC1formal

   An irrepressible energy and positive spirit that cannot be easily dampened.

   活力与乐观精神

   • The team played with great buoyancy and enthusiasm.
   • His buoyancy in the face of adversity was inspiring.
   • The party had a buoyancy that lasted all night.

   同义词animationcheerfulnessebullienceexuberancelightheartednesslivelinessoptimismresiliencespiritednessvitalityvivacity

   反义词dejectiondepressiondespondencygloomlethargy

4. Weightlessness or insubstantialityC2formal

   The quality of being light, airy, or lacking in substance.

   轻飘

   • The buoyancy of the clouds made them seem like cotton candy.
   • There was a buoyancy to her step as she danced.
   • The fabric had a buoyancy that made it float in the air.

   同义词airinessinsubstantialitylightnessweightlessness

   反义词gravitysubstantialityweight