In the middle, contained in a giant soup-bowl-shaped spatter cone, was a stunning sight: a lake of lava.
中间是一块巨大的汤碗形寄生熔岩锥，壮观的岩浆湖就被盛放在巨碗之中。
When this cone sweeps across the line of sight to Earth, we see the radio emission brighten regularly, just like a lighthouse.
当这束光扫过地球，我们就能观测到周期性变化的射电信号，就像一个灯塔。
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