noun 下载 🔗分享 紫癜 The appearance of red or purple discolorations on the skin that do not blanch when pressure is applied, caused by subdermal bleeding. Examples : "After the bike accident, the child had noticeable purpura on his legs where he hit the pavement. " 自行车事故后,孩子腿部撞到路面的地方出现了明显的紫癜,按压也不会褪色。 medicine appearance disease body physiology anatomy condition 与AI对话词汇游戏阅读练习