We've flown the Cassini Spacecraft by this moon now several times, flying closer and deeper into these jets, into the denser regions of these jets, so that now we have come away with some very precise compositional measurements.
我们操控卡西尼探测器 飞经该卫星好几次。 每次都离这些喷射流更贴近 得以进入这些喷射流密度更高的区域 这样一来，我们就取得了一些 非常准确的成分测量数据。