Hrf
abbr. human rheumatoid factor 人类风湿因子
🗣️ 情景例句
When you're out in the fresh air like this, it makes you hungry.
当你来外面呼吸这么新鲜的空气时， 就很容易饿。
Do you have a letter of introduction?
你有介绍信吗？
It looks like the moon. There are many different kinds of mooncakes.
它看起来像月亮。月饼的种类很多。