Tetraphthong
四合元音
🗣️ 情景例句
My job offers no room for advancement.
我的工作没什么发展前途。
An old physician,and a young lawyer.
医生老的好，律师年轻的好。
it would be up and down, to and for and from side to side.
呈现出上上下下、来来回回、左左右右3种性质的运动。