... First-class 一流的，头等的 First polishing 底层磨光，预抛 First-rate 一级的，头等的 ...
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In the first polishing step (S20), the compound semiconductor substrate is polished with a chloric polishing agent.
在第一抛光步骤(S20)中，用含氯抛光剂抛光该化合物半导体衬底。
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Monday opens with defence questions, before MPs move on to the first of two days devoted to polishing off the Protection of Freedoms Bill.
BBC: Viewing guide: The coming week's highlights in Parliament
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