Electiveness
选修制
🗣️ 情景例句
Oh, I'm glad that's over.
噢 我真高兴终于结束了。
We hope that you will earnestly take part in this meeting.
我们希望你们认真地参与本次会议。
Everything's very quiet.I'm sure there's no one at home.
毫无动静，肯定家里没有人。