Hdm
分层开发方法论
🗣️ 情景例句
I don't believe it!
我简直难以相信！
Hawaiians are used to the rumblings of the volcano.
夏威夷的人已经习惯于火山的爆发声了。
Hello! Could I speak to the headmaster, please?
您好！我能和校长通话吗？