绑匪通过发射电波信号同科学家联络。科学家保持电波发射联络。
The kidnappers contacted the scientist by emitting the radio signals the scientist kept in touch with the emission.
科学家们还不知道有什么方法可以增强那些能够保证睡眠的脑电波。
The scientists don't yet know of any way to boost those sleep-saving brain waves.
科学家说，接受到司机的脑电波信号能缩短刹车距离以避免撞车。
Tapping into drivers' brain signals can cut braking distances and avoid car crashes, according to scientists.
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