Cupid's bow
noun [ C usually singular ] UK uk/ˌkjuː.pɪdz ˈbəʊ/ us/ˌkjuː.pɪdz ˈboʊ/
丘比特之箭般的嘴唇（上嘴唇有两条明显的曲线）
If you have a Cupid's bow, you have an upper lip with two strong curves in it.
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