受益匪浅 shòuyì-fěiqiǎn to benefit (from)
How to remember 受益匪浅: 受 to receive + 益 to profit + 匪 bandits + 浅 shallow = to benefit (from).
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How it is used
- An idiom: 'to benefit greatly / gain a great deal' - 听了讲座，我受益匪浅 (I gained a lot from the lecture).
- Note 匪 here means 'not' (匪浅 = not shallow, i.e. considerable). A common, slightly formal way to express having learned much from something.