Tracers
(tracer 的复数) n. 追踪者, 描图者, 描绘工具\\n[计] 跟踪程序
🗣️ 情景例句
Where's the elevator?
电梯在哪儿？
That's great!
真棒！
international standards of water treatment are usually followed at bottling plants.
装瓶厂通常遵循国际水处理的标准。