Semisubterranean
a. 半地下的
??? 情景例句
The book is worth reading.
這本書值得一讀。
No matter what happens, don't be discouraged.
無論發生什么事，都不要氣餒。
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，從月球到地球的25萬英里所消耗的能量要比從地球表面進入地球軌道的200英里所耗能量少97%。