Phaeomelanin
棕黑素
🗣️ 情景例句
The veil.
面纱。
We used to go to the movies about once a week.
我们过去常一个星期大约去看一次电影。
If there had not been a hard layer of rock beneath the soil, they would have completed the job in a few hours.
如果不是因为土壤下面有一层坚硬的岩石，他们的营救工作仅用几个小时就可以完成了。