1. All cells touch the basement membrane, but only the taller cells reach the lumen. 所有细胞基部均与基膜相接处，只有高的细胞顶部到达管腔表面。
2. Depending upon the nature of gastric contents, you may see only part of the gastric wall, or you may see its lumen, and ingesta. 视胃内容物的特性而异，你可能只能见到部分的胃壁，或是可以见到它的腔室，与饮食物。
3. This is a normal coronary artery with no atherosclerosis and a widely patent lumen that can carry as much blood as the myocardium requires. 这是正常的冠状动脉，无动脉粥样硬化而是宽大的管腔，能运输充足的血液满足心肌的需要。
英英解释
n.
1. a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian
2. a cavity or passage in a tubular organ
