Epitron
电子和π介子束碰撞系统
🗣️ 情景例句
She called to say the plane was delayed.
她打电话回来， 告诉我们飞机误点。
John has his own family now.
约翰现在有自己的家了。
He has been there for six months.
他在那儿已经住了6个月了。