Hubble constant
na. 【天】哈勃常数\\n
🧩 词语组成解析
n. 小凸起, 小瘤
🗣️ 情景例句
I don't have time to take any elective classes.
我没有时间去上任何选修课。
She is hard to please.
她很难取悦。
But none of them has been turned to stone yet!
但到目前为止还没有一个变成石头呢！