Birefringencemeter
双折射检查仪
🗣️ 情景例句
Hi, Bob.
嗨，鲍勃。
You have also made some readjustment in your import and export business, have you?
你们的进出口贸易也有一些调整，对吗？
No. He just asked if you could ring him back. Here's the number.
没有，他只问你能不能给他回一个电话。这是他的电话号码。