R factors
[医] R因子, 叶酸
🧩 词语组成解析
n. 因素（factor的复数）
🗣️ 情景例句
I'll be in town next week, maybe you could fit me in.
我下个礼拜会在城里，也许你能安排时间见我。
My brother wants to learn how to dance.
我的兄弟想要学习跳舞。
In addition to all her other qualifications, Bessie was an expert cook.
贝西除了有各种本领以外，还是一个烹饪大师。