Optical storage
[计] 光存储器
🧩 词语组成解析
🗣️ 情景例句
and he doesn't know anything
而他毫无所知
At the moment, he is a bit worried about his English.
就在那时候，他有点担心他的英语。
In a few days I was learning and enjoying it like any child.
几天之后，我像一个孩子那样学习起来--而且学得很开心。