它们与来自彗星的尘埃颗粒结合在一起，形成了巨大的云团。
They combine with dust particles from the comet to form a huge cloud.
硫化物、氮化物会形成酸雨，细小尘埃颗粒会影响人的健康。
Sulfide, nitride can form acid rain, fine dust particles can affect people's health.
硫化物、氮化物会形成酸雨，细小尘埃颗粒会影响人的健康。
Sulfide, nitride can form acid rain, fine dust particles can affect people's health.
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