The researchers found that four separate galaxy clusters are involved in a triple merger, the first time such a phenomenon has been documented.

研究者发现四个分离的银河系星云正在进行三重合并，这也是这种情况第一次被记载。

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'we have a triple pushchair and we've had to get a bigger car, a seven seater Ford Galaxy.'

我们有一个三重的婴儿车，还换了一辆更大的汽车，一辆七人座的福特银河车。

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The discovery of exoplanets in binary and triple-star systems raises the prospect that the galaxy houses many more such objects than was previously thought.

ECONOMIST: Planetary science: When a world is born | The