cymhleth

Organeb gyda chelloedd cymhleth yw ewcaryot.

Organisms with complex cells are eukaryotes.B1

O ran Bil Diogelwch Adeiladau (Cymru), fe fyddwch hefyd yn gwybod ein bod yn bwriadu cyflwyno hyn fesul cam, gan ddechrau'n fwyaf arbennig gydag adeiladau categori 1, sef yr adeiladau mwyaf cymhleth bob amser, yr adeiladau uwch.

In terms of the Building Safety (Wales) Bill, you'll also know that we intend to introduce this in a phased approach, starting particularly with category 1 buildings, which are always the most complex buildings, the higher buildings.C1

Mae wedi'i waethygu gan bandemig COVID ac mae'n fater cymhleth yr ydym wedi ymrwymo'n llwyr i weithredu arno.

It has been made worse by the COVID pandemic and is a complex issue that we are completely committed to taking action on.C1

Yn amlwg, mae mynd i'r afael ag argyfwng parhaus recriwtio a chadw athrawon yn waith cymhleth ac mae llawer o wahanol elfennau'n perthyn iddo.

Obviously, tackling the ongoing teacher recruitment and retention crisis is a complex piece of work and has many different strands.B2

Roedd y gwres eithafol yn golygu bod yr hyn a fyddai wedi bod yn waith atgyweirio syml wedi dod yn fwy cymhleth, gan arwain at ganslo trenau i ac o Aberdâr a Merthyr Tudful.

The extreme heat meant that what would have been a straightforward repair became more complex, resulting in the cancellation of trains to and from Aberdare and Merthyr Tydfil.C1