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...Le Cornu (2011) yn eu diffinio fel hyn: ‘Mae Ymwelwyr yn meddwl am y we fel rhywbeth tebyg i sied offer gardd anniben. Maen nhw wedi diffinio nod neu dasg ac yn mynd i mewn i’r sied i ddewis teclyn priodol i’w ddefnyddio i gyflawni eu nod. Ar ôl gorffen y dasg, maen nhw’n dychwelyd y teclyn i’r sied. Mae Preswylwyr, ar y llaw arall, yn meddwl am y we fel...

...Le Havre, Brest, Marseille, Toulon and Nice are all seaport cities, while Paris and Bordeaux are principal inland ports. All the rest of the twenty largest cities are situated on or near rivers, but are not considered major port cities. Note that the first description makes no mention of the cities shown, whilst the second makes no mention of specific rivers. When...