Quacked
v. （鸭子）发出嘎嘎声( quack的过去式和过去分词 )
🗣️ 情景例句
on the patio this morning.
要在院子 。
No garden without its weeds.
有利必有弊。
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%。