We might even encounter an alien type II civilization long before we achieve that level ourselves.
我们也许甚至会在自己远未达到第二阶段水平时就遇到了那个阶段的外星文明。
Most people will use a fuel cell in a portable device long before they encounter one in a car, Mr Balcom predicts.
Balcom先生预测大多数人将在燃料电池车之前用上燃料电池便携设备。
Most people will use a fuel cell in a portable device long before they encounter one in a car, Mr Balcom predicts.
Balcom先生预测大多数人将在燃料电池车之前用上燃料电池便携设备。
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