Hubble's constant
na. 【天】哈勃常数\\n
🧩 词语组成解析
🗣️ 情景例句
You'll feel better after a good night's sleep.
你好好睡上一觉就会好些。
One cloud is enough to eclipse all the sun.
一叶可障目。
I have my hair cut every month.
我每个月都理发。