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Definitions3 characters
Yuan2 gu3 zhou4
pre-Cambrian (geological eon 2500-645m)
Usage•••frequent
Pronunciations

As word

1
Yuan2
pre-Cambrian (geological eon 2500-645m)
2
gu3
pre-Cambrian (geological eon 2500-645m)
3
zhou4
pre-Cambrian (geological eon 2500-645m)