Blastocelis
[医] 胚斑(卵细胞核仁)
🗣️ 情景例句
and how hard it is
他还说这件事很难
I suppose it might be gold.
说不定是金子啊。
or even the universe itself, must in the nature of things 'wear out'.
甚至宇宙本身，从事物的本质上来说都会磨损掉"。