normail cycles是什么意思

normal cycle

[地质] 常态旋回；[计] 正常循环

normal cycle

正常周期 一般循环

例句：

But few conclusions can be derived from a single expedition. Only long-term studies can determine which type of gas fluctuations are cause for alarm and which are part of the volcano's normal cycles.

但是仅凭一次探险无法获得足够多的结论，只有通过长期研究才能确定引发警报和象征火山正常活动周期的分别是哪种类型的气体波动。

Good luck…In fact it is questionable whether this "climate change" isn't just normal cycles of weather.

祝好运吧…事实上’气候变化‘不只是天气的一般循环这一点是值得质疑的。

（来自知米背单词的释义）

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