1. While these records provide broadly consistent indications[让步状语从句] that temperature variations can occur on a global scale,[同位语从句] there are nonetheless some intriguing differences,[主句] which suggest[非限定性定语从句] that the pattern of temperature variations in regional climates can also differ significantly from each other.[宾语从句]

2. To the extent that the coverage of the global climate from these records can provide a measure of its true variability,[同位语从句] it should at least indicate[主句] how all the natural causes of climate change have combined.[宾语从句]

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