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
Carl, now you know charades.
Carl，现在你知道什么是哑谜了。
Boy, you are in a lousy mood!
天啊，你情绪糟糕透了！
By correlating markings made in various parts of the world, historians have been able to read this difficult code.
历史学家通过把世界各地留下的这种痕迹放在一起研究，终于弄懂了这种费解的代码。