curve widening平: flat; level; even; smooth曲线: curve; curved line加宽: broaden; widen曲线加宽: curve widening; widening of curve; widening on curve平曲线: horizontal curve; plane curve下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:平曲线加宽，即可在微信中查询翻译
