Melaena
n. [医]黑粪症
🗣️ 情景例句
We have to work hard to get people interested in politics.
我们必须努力使人们对政治感兴趣。
We hope they will improve the environment.
我们希望他们把环境改善得更好。
All the biscuits that were sent were carefully weighed.
凡送来的饼干都仔细地称量。