The requirement on speed actuation is refined by the possible selection for speed: slow, medium, or fast.

快速启动的需求由可能的速度选择细化：慢速、中等或快速。

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The big question about the Chinese economy is not whether it can continue to grow at a fast clip – it almost certainly can in the short to medium term.

中国经济的重大问题，不在于它能否持续迅速增长——就中短期而言，几乎可以肯定中国经济能做到这一点。

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But in practice there are slow, medium, and fast boils.

实际操作起来有慢火煮沸，中火煮沸和大火煮沸之分。

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The Gateshead-born medium-fast bowler has remained loyal to his county and is content to enjoy success with Durham, regardless of personal recognition.

BBC: Onions plays down England claims

Sibanda hit 11 boundaries in 54 balls against Pakistan's inexperienced trio of medium-fast bowlers before Rao Iftikhar Anjum had the opener caught at mid-on.

BBC: Jamshed impresses in Pakistan win

He's had a congested career, spending two years bowling really quickly rather than the usual eight, and he's now bowling at a fast-medium pace.

BBC: Bond in the swing for Kiwis