该船用无线电广播发出求救的信号。
将近60年以来，民用的无线电广播一直用的是长波。
Commercial radio broadcasters have used long waves for nearly 60 years.
据说世界上百分之六十的无线电广播和百分之七十的邮递业务用的是英语。
It has been said that 60 percent of the world's radio broad casts and 70 percent of the world's mail USES English.
据说世界上百分之六十的无线电广播和百分之七十的邮递业务用的是英语。
It has been said that 60 percent of the world's radio broad casts and 70 percent of the world's mail USES English.
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