Spongin
n. [生化]海绵硬蛋白
🗣️ 情景例句
We're going to take it slow first.
开头我们要做慢一点。
To live in the library
过着研究的生活
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
作出这样的准备是必要的，因为无法预见到洞穴探险者究竟会遇到什么性质的困难。