“sunspot cycle”造句，怎麼用sunspot cycle造句

Changes to the sunspot cycle will have an impact on our weather and climate — but not a very big one. David Biello reports.

Changes to the sunspot cycle will have an impact on our weather and climate — but not a very big one.

Conditions on the 15 and 10 meter novice band are slowly improving these days, although the current sunspot cycle 23 is now slowly diminishing