The deformity of the bilateral cleft lip is complicated. The routine procedure often results in secondary deformities, such as over-tight lip, and over-thin vermilion.
双侧唇裂畸形多较复杂，修复术后常出现上唇过紧，唇红过薄等继发畸形。
My grip on the control bar was painfully tight as I ran down the lip of the dune.
当我沿着沙丘的边缘向下快速奔跑时，我的双手紧紧抓住控制杆，甚至让我感到了疼痛。
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