Rfl
abbr. 无复发活存（Reiter-Feissinger relapse-free survival）；间苯二酚
🗣️ 情景例句
I have been learning English for three years now.
我学英语有3年了。
It seems he has a lot of bright ideas.
看起来他好像有很多聪明意见。
namely 6 million million miles.) Radio waves also travel at the speed of light,
即6万亿英里）。无线电波也是以光速传播的。