Headgroups
(headgroup 的复数) [医]首基
🗣️ 情景例句
I want to thank all of you for coming here tonight.
我非常感谢你们大家今天晚上的赏光。
The child is father of the man.
三岁定到老。
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%。