Marconi tied several antennas to kites.马可尼在风筝上系了几根天线.Radio astronomy today is armed with the largest antennas in the world.射电天文学拥有世界上最大的天线.The jet has 57 antennas for its huge array of electronic gear. Normal is 17.机上装有五...
We mustn't condemn him on mere suppositions.我们不可全凭臆测来指责他.But as with many such suppositions in natural history, no one had ever tested it.博物学中虽然有许多类似的假设,却从没人对此考证过。We must make one of two following highly improbable ...