Padds
[医][=photon-activated drug delivery system]光催化剂运载系统
🗣️ 情景例句
There are four of us including my parents, a younger sister and me.
有四口人，父母亲、妹妹和我。
This is my second year of college, I'm a sophomore.
这是我上大学的第二年，我是二年级学生。
What was it like?
那次地震怎么样？