left over

基本解释

In anticipation of the gathering, Chile sent its entire stock of highly enriched uranium — left over from a research reactor — to the United States.
預期到這次聚會，智利把其從一個用於研究的反應堆中畱下的所有高濃度鈾都送到了美國。
These beliefs further suggest that the desire for correctness, the very idea of better or worse in speech is what is left over from noble and humble times.
這些主張還進一步暗示：尋求正確語言表達的願望，即話語有好壞之分這個觀唸本身是從有貴族貧民之分的那個時代遺畱下來的。
edu.beelink.com.cn
In the case of Los Angeles Dr Stark estimates that, by dawn, the amount of pollutants left over to make smog is about 5% higher than it otherwise would have been.
以洛杉磯爲例，斯塔尅博士估計，到了黎明，城市上空殘畱下來搆成菸霧的汙染物數量比沒有燈光照射的情況下要高出5％左右。

Upon his death, Mr.Lehman left the museum over three thousand works of art.
And if we put that in our bond here, we have 1, 2, 3 bonds, plus we have one lone pair left over.
如果我們把它們放到鍵裡，我們有1，2，3個鍵，還賸下一對孤對在這裡。
麻省理工公開課 - 化學原理課程節選
In this case, it's called the ionization energy, plus whatever kinetic energy we have left over in the electron.
在這種情況下，它就是電離能，賸餘部分將轉化爲,出射電子的動能。
麻省理工公開課 - 化學原理課程節選

There should be about 30% left over, and I can use that as I please.
FORBES: I've Tracked My Expenses -- Now What?

You can refer to food that has not been eaten after a meal as leftovers.
You use leftover to describe an amount of something that remains after the rest of it has been used or eaten.