E.m.f.
[医] 电动势, 红细胞成熟因子
🗣️ 情景例句
Hmm?
嗯？
An empty purse frightens many friends.
曩中无分文，亲友不上门。
Frank smiled when he remembered his hard early years and the long road to success.
弗兰克回想着他早年的艰难经历和走过的漫长的成功之路，微笑了。