Trackballs
(trackball 的复数) n. 追踪球；轨迹球
🗣️ 情景例句
The mall's packed today.
今天商场里的人很多。
She is wearing an apron.
她穿着围裙。
'Can I return these two tickets?' he asked.
“我可以退掉这两张票吗？”他问。