The nature of eruption triggering, though, is not well understood.
然而触动火山喷发的原因还不是很清楚。
When lightning does come, however, it seems to be there right from the start of eruption.
不过，当闪电确实出现的时候，它好像在喷发一开始就存在了。
Time of eruption of deciduous teeth have a lot of individual differences.
乳牙的萌出时间有很大的个体差异。
Time of eruption of deciduous teeth have a lot of individual differences.
乳牙的萌出时间有很大的个体差异。
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