noun 下载 🔗分享 流明，光通量单位 In the International System of Units, the derived unit of luminous flux; the light that is emitted in a solid angle of one steradian from a source of one candela. Symbol: lm. Examples : "The new desk lamp provides 800 lumens of light, making it much brighter for studying. " 这款新台灯提供800流明的光照，所以学习的时候会更亮。 physics energy technical unit 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 腔，内腔，管腔。 The cavity or channel within a tube or tubular organ. Examples : "The doctor inserted a small camera into the artery to examine the lumen for any blockages. " 医生将一个小型摄像机插入动脉，检查内腔是否有堵塞。 anatomy organ physiology medicine 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 细胞腔，内腔 The cavity bounded by a plant cell wall. Examples : "The plant cell's lumen, visible under the microscope, appeared as a clear space enclosed by the surrounding green cell wall. " 在显微镜下可以看到，植物细胞的细胞腔呈现为被周围绿色细胞壁包裹的清晰空间。 biology plant part structure 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 管腔，内腔 The bore of a tube such as a hollow needle or catheter. Examples : "The doctor checked the IV line to make sure the lumen wasn't blocked. " 医生检查了输液管，确保管腔没有堵塞。 medicine anatomy part device 与AI对话词汇游戏阅读练习
