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 Thanksgiving Day parade is always such great fun.
感恩节的游行总是如此有趣。
A fool knows more in his own house than a wise man in another.
一个蠢材在他自己家里所知的事比一个聪明人在别人家里所知的事要多。
He lands on top of each house and climbs down the chimney into the fireplace.
他降落在每一家的房顶，顺着烟囱爬进壁炉。