Trying to learn how to translate from the human translation examples.
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y swyddfa gymreig oedd yn gyfrifol am y cynllun hwnnw yn ôl pob golw ; er fod hynny tua phedair blynedd ar ôl i'r swyddfa gymreig ddod i ben
the welsh office was apparently responsible for that schem ; that is some four years after the welsh office ceased to exist
yr oedd yn wych oherwydd wrth i mi gael fy nhywys o amgylch , pwysleisiodd y tywysydd , er bod yna ddulliau dyfeisgar yn bodoli er mwyn ail-ddefnyddio'r ynni a ddefnyddir yno , ni wneir hyn gyda dim ond yr amgylchedd mewn golw ; mae rhesymau masnachol dilys dros wneud hynny
it was excellent because when i was being taken around , the guide made it clear that , although all sorts of imaginative methods to reuse energy are used there , that is not done with only the environment in min ; there are sound commercial reasons for doing so