Opticalmechnical
光学机械
🗣️ 情景例句
What are your strengths?
你的优点是什么？
I feel guilty because I haven't written her lately.
因为我最近没给她写信，我感觉到有罪。
The most important factor in our environment is the state of our own minds.
我们环境中最重要的因素就是我们的思想状况。