Diphthongs
n. 双元音( diphthong的复数形式 )
🗣️ 情景例句
Hi, there!
你好！
It is an equal failing to trust everybody,and to trust nobody.
信任一切与不信任任何人，同样是弱点。
it was not long before its use as the uniquely recognizable broadcasting frequency for interstellar communication was suggested.
提出把它作为星际间唯一可辨认的广播频率就为期不远了。