Retinyl
视黄基
🗣️ 情景例句
We have around 3,000 workers.
大约有3000名职工。
I know the boy whose father is a mailman.
我知道那个男孩的父亲是邮差。
This is a kind of printing that blind people can read by touching groups of raised points that are printed on paper.
布莱叶盲文是一种印刷字体，盲人通过摸印在纸上起的点点来读书。