It was a bit of a surprise, given that most solar observations show a pattern of about 28 days - the rotation rate of the surface of the sun.
这令人感到小小的惊讶，因为大多数太阳观测显示出一个以28天为周期的模式——这正是太阳表面的旋转周期。
It was a bit of a surprise, given that most solar observations show a pattern of about 28 days - the rotation rate of the surface of the sun.
这令人感到小小的惊讶，因为大多数太阳观测显示出一个以28天为周期的模式——这正是太阳表面的旋转周期。
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