这里它将达到超音速然后超高速冲压喷气发动机切换成工作状态，迎面气流进入发动机，与燃料混合，混合物在超音速状态流过引擎。

Here it would reach supersonic speeds and then shift to its scramjet engine. The scramjet scoops up air and mixes it with fuel so it burns as the mixture flows through the engine at supersonic speeds.

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在耗费了大约数百万年的时间后，这种混合物终于向着泰坦星中心的方向稳定了下来，“热量散发和冷却星体都用了很长的时间，最终才达到了目前的稳定状态，”Iess说。

This mixture took a leisurely million years or so to settle toward Titan's center—"plenty of time for heat to escape" and for the moon to cool into its present state, Iess said.

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而且我们从一个混合物到了另一个混合物，这很关键它能告诉我，是否达到了平衡状态。

And I'm going to go from one mixture to another mixture, and that's going to be the key to telling me if I'm in equilibrium or not.

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