基本解释上升曲线同根派生 upcurve相关词英汉例句The underline stays level with the elbows to a slight upcurve at the flank. 下腹曲线水平，从肘部到腰窝略微上提。solid upcurve bifocal lens 上弯形整块双焦点透镜upcurve更多例句