Someone threw an apple core.

有人扔了一个苹果核。

《柯林斯英汉双解大词典》

An apple core is the part of an apple left after the flesh has been eaten.

苹果核是在苹果肉吃完后剩下的部分。

youdao

Say--I'll give you the core of my apple.

喂，我把苹果核给你。

youdao

Apple without Steve Jobs in the past has been just a bad apple core.

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But the whole thing, Apple Core and The Beatles are one million percent behind this thing.

NPR: Cirque du Soleil Interprets the Fab Four

Google has copied and replicated Apple core offerings with its G-neric Droid smart-phone, Android tablets, Chromebook, and Google Music Store.

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