noun 下载 🔗分享 上行笔画,上冲程 The upward stroke of a pen, brush, piston, etc. Examples : "The calligrapher emphasized the delicate thinness of each upstroke in the letter "A." " 书法家特别强调字母“A”中每一笔上行笔画的纤细之处。 writing technical machine art action 与AI对话词汇游戏阅读练习