He needs to fine down his theory a bit.

他需要使他的理论更完善一些.

《简明英汉词典》

The whole plant is covered with fine down.

整株植物都覆盖着细茸毛。

辞典例句

She can fine down her voice to a whisper.

她能把声音压的又细又低.

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Her doctor told her to fine down her weight.

她的医生让她减肥.

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Precision manual fine down feed.

精密手工精细下来的饲料.

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