Tracerlab
同位素示踪物实验室
🗣️ 情景例句
Maybe we should do it again.
也许我们该再来一次。
Do you live across from the Public Hall?
你在大会堂对面居住吗？
As Fred was going in the same direction, he walked along with the tourist.
因为游客与弗雷德走的是同一个方向，他便与游客一道同行。