Pion
[化] π介子
🗣️ 情景例句
alone in the animal shelter.
独自在动物收容所 。
Have you seen Mr. Smith recently?
最近你见过史密斯先生吗？
It's a pleasure to meet you. Can I take those boxes for you?
很高兴认识您。我能帮您拿那些箱子吗？