所称“贵金属”，是指银、金及铂；

The expression "precious metal" means silver, gold and platinum;

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英国保诚保险公司股价上涨3.6%，至634便士，推动保险板块创下斯托克600指数19个行业板块的最大涨幅，瑞银集团此前把保诚保险列入欧洲企业的利好名单。

Prudential climbed 3.6 percent to 634 pence as UBS added the stock to its European "key calls" list, leading a measure of insurers to the biggest gain among 19 industry groups in the Stoxx 600.

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云的催化是指将催化剂颗粒打入云中使云中的水蒸汽凝聚成水滴，从而实现降雨的技术，催化剂颗粒通常为碘化银。

Cloud-seeding is a technique to enhance rainfall by introducing particles - often silver iodide crystals - into cloud systems, to help condense water vapor into raindrops.

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Here, the gold and silver apples are specifically alchemical symbols of body and soul, and a kind of mystical image of earthly paradise.

这里银苹果金苹果具体指,身体和灵魂魔法上的象征，是古时天堂的一种形象。

耶鲁公开课 - 现代诗歌课程节选