The theory sounds eccentric but once he starts to explain the detective work that went into his deduction, the scepticism gives way to wary admiration.

这个理论听起来怪怪的，但一旦他开始解释符合他的推理的侦探工作，怀疑就变成了对他谨慎的赞赏。

youdao

Once he starts that, it will take at least six weeks.

即使他开始了恢复性运动，他的回归也至少需要六个星期。

youdao

Once he starts drinking he talks all sorts of nonsense.

他一喝酒就会胡言乱语。

youdao

And,he warns there will be outbreaks of diseases such as diarrhea, meningitis and malaria once the rainy season starts in a couple of months.

VOA: standard.2009.03.28

But once he starts playing, Walter blends right in.

NPR: Learning to Drum �� and Live �� in 'The Visitor'

Emotionally, once the event starts, he will be fine, and if he comes out firing we've got our very own Tiger Woods.

BBC: SPORT | Golf | Ken Brown column

Ryan Gosling is a touch too sympathetic for the freeze-dried, laconic Driver whom we follow in the first half, and, once the mood is fractured and he starts to dish out bestial beatings, that stillness is badly devalued.

NEWYORKER: Road Kill