Tracerlab
同位素示踪物实验室
🗣️ 情景例句
It's our meal from the restaurant.
这是从餐厅带回来的菜 。
John would like to touch some of the sculpture in the art gallery.
约翰想触摸几件美术馆的雕刻。
I'm from Canada.
我是加拿大人。