Elastooptics
弹性光学
🗣️ 情景例句
What books are required for this class?
这课需要什么样的书？
I can't promise anything,but I'll do my best.
不敢保证，不过我尽力而为。
Check the prices before you decide whether to buy one.
先把价格核对一下，再决定该不该买。