one very natural and very polite way to send an invitation is by using the "I'd like" pattern.

一种非常自然并且礼貌的邀请做法是使用“I'd like”句型。

I'd like 课堂 - SpeakingMax英语口语达人

It follows instead the pattern of natural causes, such as sunspot cycles, and ocean temperature cycles.

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Instead, the temperature record shows an up and down pattern that follows the pattern of natural influences on global temperatures, such as cyclical sunspots and solar flares, and cycles of ocean churning from warmer to colder temperatures and back, such as the Pacific Decadal Oscillation (PDO).

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The current rise in the number of big storms seems, therefore, to be part of a natural pattern.

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