Radiometallography
射线金相学
🗣️ 情景例句
Good evening, how may I help you sir?
晚上好，你需要帮助吗？
To carry dirt
清理垃圾
Four years later, she left the children's home and entered an institution for the blind, where she learnt braille.
4年之后，她离开孤儿院，进入一盲人学校，学习布莱叶盲文。