her

Felly, mae’n her fawr, yn enwedig os ydych chi’n edrych, ar y funud, ar y lleihad o bron i 50 sydd wedi bod ers 2017.

So, that is a great challenge, particularly if you're looking at, at the moment, a reduction of almost 50 teachers since 2017.C1

Nid oedd gennym unrhyw reolaeth dros amseriad yr her benodol hon.

We had no control over the timing of when this particular challenge was presented.B2

Y pandemig oedd her iechyd cyhoeddus fwyaf dybryd ein hoes.

The pandemic was the greatest public health challenge of our age.B2

Mae yna her gwirioneddol yn y fan yma.

There's a real challenge here.A2

Yn olaf, dyw'r gyfraith yma ddim yn mynd i ateb pob problem neu bob her yn y system gynllunio.

Finally, this law isn't going to resolve every problem or every challenge in the planning system.B2