Dwi ddim yn arbenigwr o bell ffordd, ond dwi'n meddwl fy mod i wedi
defnyddio "cyfres" yn y cyd-destun yma yn y gorffennol.
Dwi ddim yn cofio ar ba sail y gwnes i hynny chwaith!
Geraint
----- Original Message -----
From: "Sian Roberts" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, April 09, 2013 9:24 AM
Subject: series
Ai "cyfres" yw'r gair am "series" mewn cyd-destun daearegol?
Geology: A group of rock formations closely related in time of origin and
distinct as a group from other formations.
Diolch
Siân
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