Alternating e.m.f.
[电] 交变电势
🧩 词语组成解析
a. 交互的\\n[医] 交替的
[医] 电动势, 红细胞成熟因子
🗣️ 情景例句
You're a wonderful granddaughter.
真是个好孙女。
You look very serious about something.
你似乎有很严重的事。
it requires 97 per cent less energy to travel the quarter of a million miles from the Moon to Earth-orbit than the 200 mile-journey from Earth's surface into orbit!
因此，从月球到地球的25万英里所消耗的能量要比从地球表面进入地球轨道的200英里所耗能量少97%。