Opticalmechnical
光学机械
🗣️ 情景例句
Yes. About four years ago.
是的 ，大约四年前走的。
We assume that damage occurred while the consignment was in your care.
我们认为货物是在你方保管时受到损害的。
he thinks of it, whatever its size,
当他想像一个物体时，不管其大小如何，