Mass number
[化] 质量数\\n[医] [原子]质量数
🧩 词语组成解析
mass
[mæs]
n. 大量，大多;块，堆，团;[物理学]质量;弥撒曲;
vt.& vi. （使）集中，聚集;
adj. 群众的;大规模的;整个的;集中的;
vi. 聚集起来;
vt. 使集合;
🗣️ 情景例句
Can you tell me where the campus library is located?
能告诉我校图书馆在哪儿吗？
Thank you but this is something I have to decide alone.
但有些事情我必须自己作决定。
Though Mr.Thompson had turned the lights off before he went to bed, they were on in the morning.
虽然汤普森临睡觉时把灯关了，但早晨灯却都亮着。