Mfat
[醫][=multifocal atrial tachycardia]多源性房性心動過速
??? 情景例句
He's a little quiet.
他有點沉靜。
It's easy to fall into a trap, but hard to get out again.
墮入陷阱易，脫離陷阱難。
It is thought that they arrived more than 30,000 years ago by crossing a land bridge from Asia to America.
他們被認為是在3萬多年以前從亞洲跨越一座陸橋來到美洲的。