Spectralite
光学玻璃
🗣️ 情景例句
What's your title?
你的头衔是什么？
You look tired. Have you been getting enough sleep?
你似乎累了。睡眠充足吗？
We must conclude from the work of those who have studied the origin of life,
我们必须从那些研究生命起源的人的工作总结出：