Deltaic
a. 三角形的, 三角洲的
🗣️ 情景例句
Oh, Robbie will be disappointed.
啊 ，Robbie会很失望。
Don't forget to cable to let us know you arrived safely.
不要忘记在你安全地到达后打电报让我们知道。
Oh, it doesn't matter!
噢，没关系！