Theca
n. 囊, 膜, 鞘\\n[医] 膜, 鞘
🗣️ 情景例句
I'm taking 19 credit hours.
我修了十九个学分。
I feel terrible about it.
太对不起了。
that given a planet only approximately like our own, life is almost certain to start.
如果设想有一颗行星和我们地球的情况基本相似，那几乎肯定会产生生命。