corners of the mouth短语⁷⁹⁹⁷⁸⁺⁹ 基本例句 口角 Vitamin B2 deficiency may cause cracked and red lips and cracks at the corners of the mouth, dry and scaling skin, and the eyes may also become bloodshot, itchy, watery, and sensitive to bright light. 维生素 B2缺乏可能会引起嘴唇破裂和红肿，嘴角破裂，皮肤干涩以及眼睛充血，发痒，湿润和对光线过敏。 kf