The price of this model of cassette-player is 2500 Belgian francs at today's rate of exchange.
这个型号的录音机,按今天汇率,每台2500比利时法郎。
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%。