Trackballs
(trackball 的复数) n. 追踪球；轨迹球
🗣️ 情景例句
and you can listen to him over the phone.
而且你可以在电话中听到他的声音。
To worry
烦恼，担心
I hope no questions about the terms.
我看合同的条款没有什么问题了。