Birefraction
双折射
🗣️ 情景例句
I'm here to see Mr. Carlson.
我来见Carlson先生。
I read 8 lines.
我读了八行字。
In Gambia, as in most parts of Africa, there are few written records of family histoy.
冈比亚同非洲多数地方一样，有关家族的书面记载为数极少。