宇航员取回了一块月岩样本.Astronauts brought back a piece of the moon.1993年, 一块苏联的月岩标本在苏富比拍出了$442, 500的高价.S . government property . At Sotheby's in 1993, a Soviet sample fetched $ 442, 500....
Marconi now found that he could transmit Morse Code signals.他现在可以用它来发送和接收莫尔斯电码了.This third demonstration was naturally a very important one for Marconi.当然,这次实验对马可尼来说十分重要.We owe it to Marconi and Bell that we can now talk...