Mrf
abbr. magnetic resonance bloodflow scanning 磁共振血流量计; maintenance replacement factor 维修更换因素; marble floor 大理石地面
🗣️ 情景例句
There are several tours of the Grand Canyon.
到大峡谷有好几个旅游团。
When I get sleepy,I'll probably get ready for bed.
当我磕睡时，我将上床。
That's the man I told you about. Remember?
这就是我跟你说过的那个人。还记得吗？