Variopter
(滑动)光学计算尺
🗣️ 情景例句
It's the world's largest island, but it's also the world's smallest continent.
它是世界上最大的岛屿，同时也是世界上最小的洲。
Do you have some change?
你有零钱吗？
The weather was very cold, and many people were ill.
天气非常冷，很多人生了病。