Scouts twenty billion miles out had detected the approach of a mighty fleet of the Outsiders.Those scouts had never come back, but their radiotronic messages had.

• 地球方面的载人侦查器发现了200亿英里外正在不断逼近的侵略者舰队，可他们却因此而再未返航，取而代之的是被传回的无线电信号。