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
The match was postponed to the following Saturday because of bad weather.
比赛因天气不好而延期到下个星期六进行。
Immature!
幼稚！
Huifang jumped quite far, but Ann jumped farther.
惠芳跳得相当远，但是安跳得更远。