回飞棒星云的膨胀创造了一种宇宙冰箱，使气体维持其异常的寒冷。

The Boomerang Nebula's expansion creates a kind of cosmic refrigerator, allowing the gases to maintain their unusual cool.

youdao

然而回飞棒星云的扩张却创建了一种特定类型的宇宙的冷冻器，它能容许气体维持它们原来的异常冷却温度。

But the Boomerang Nebula's expansion creates a kind of cosmic refrigerator, allowing the gases to maintain their unusual cool.

youdao