Bioerosion
生物侵蚀
🗣️ 情景例句
Not a lot.
没什么重要的事啦。
One cloud is enough to eclipse all the sun.
一叶可障目。
About once a month. Not too often, because neither of us has much time. We both have too much work to do.
大约每月一次。不太经常写信，因为我俩的时间都很紧。我们都有做不完的事。