Unverified80% confidenceTradeoffTime unknown
开扣便捷性与支撑力度存在矛盾：一键下拉式罩杯为方便开合往往牺牲侧比和上缘固定，托举和聚拢效果弱于普通文胸；追求外出显身材可选侧比加宽+胶骨的哺乳款，但开合会稍麻烦
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