Tetraphthong
四合元音
🗣️ 情景例句
and I felt I should spend more time
我觉得应该多花些时间
What should this sandwich be seasoned with?
这些三明治该加些什么调味品好？
It is one of the most unpleasant discoveries which we all make that we must decline in this way,
人人必然会衰老。