Insufficiency is the state of not having enough, or of not being great enough for what is needed. There can be an insufficiency of proof, of money, of evidence, of vitamin D.

Insufficiency這個字 is the state of not having enough指的是不夠、沒有足夠的狀態, or of not being great enough for what is needed或不足以應付所需。of proof, of money, of evidence, of vitamin D在證明、金錢、證據、維生素D等方面 there can be an insufficiency都可能出現不足。

Though actually, in ordinary conversation people almost always say ‘not enough’ or use the adjective insufficient. The noun sounds formal.

Though actually不過, in ordinary conversation在日常對話裡 people almost always say 「not enough」 or use the adjective insufficient人們幾乎都只說 not enough 或用形容詞 insufficient。The noun這個名詞 sounds formal聽起來比較正式。

Doctors use it a lot: if a part of the body cannot do its job well enough, they may speak of an insufficiency — of the heart, of a valve, of the kidneys. So students will meet this word in serious writing, reports, and medical English more than in chat.

Doctors醫生 use it a lot很常用這個字: if a part of the body cannot do its job well enough如果身體某個部位的功能不夠好, they may speak of an insufficiency他們可能會說 insufficiency — of the heart, of a valve, of the kidneys像是心臟、瓣膜、腎臟的功能不全。So所以 students in serious writing, reports, and medical English學生在正式寫作、報告、和醫學英文裡 will meet this word比較會遇到這個字 more than in chat而不是在聊天裡。

It names the gap: what you have does not reach what the situation asks for.

It這個字 names the gap指的是那個落差: what you have你擁有的 does not reach沒有達到 what the situation asks for情況所需要的。