怎么用最简单的几句英语介绍珍珠 英语
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【答案】 A pearl is a hard object produced within the soft tissue of a living shelled clam.The ideal pearl is perfectly round and smooth,but many other shapes occur.The finest quality natural pearls have been highly valued as gemstones and objects of beauty for many centuries.Because of this,pearl has bee a metaphor for something rare,fine,admirable and valuable.