弘扬国学 · 传承文化

帝一辞典　

C英英释意-帝一辞典

首页英语词典CC英英释意

C

英美[si]

英英释义词组搭配实用场景例句

symb. 碳（carbon）
n. 字母C

英英释意

1. the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second