Photoelastometry
光测弹性术
🗣️ 情景例句
Coming! Coming!
来了， 来了。
To carry dirt
清理垃圾
One day, the man downstairs went to talk to the man. He went upstairs and knocked the door.
一天，楼下人去找楼上人谈谈。 他上楼敲门。