Melena vera
[医] │真性黑粪症
🧩 词语组成解析
n. [医]黑粪症
abbr. 通用实验性反应堆装置（Versatile Experimental Reactor Assembly ）
🗣️ 情景例句
Are there any sports clubs on campus?
校园中有什么体育活动俱乐部吗？
We hope they will improve the environment.
我们希望他们把环境改善得更好。
Both the police and the workmen were grateful to the student for this piece of advance information.
警察与工人都对那个学生事先通报情况表示感谢。