Referrer
推荐人; 介绍人; 提到某人（或某事）的人
🗣️ 情景例句
He's on the phone.
他在电话上。
I'm coming.
我来啦。
Instruments have been devised and can be so placed that all three elements can be recorded in different graphs.
已经设计出了一些仪器，它按照一定的安放方式就可测绘出这三种运动的曲线图。