what the although means in here? please explains~~ Professor Ronald Bracewell, a leading American radio astronomer, argued in Nature that such a superior civilization, on a visit to our own solar system, may have left an automatic messenger behind to await the possible awakening of an advanced civilization. Such a messenger, receiving our radio and television signals, might well re-transmit them back to its home-planet, ALTHOUGH what impression any other civilization would thus get from us is best left unsaid. the best way is that you could translate the although, just the although in here into chinese for me if you know.