Triangular file-useful in all aspects. Big girls sew doll clothes-it's always useful. Embroidery is aimed at iron beams-each has its own strengths; Size has its own uses.

It is useless to describe;

A big stupid elephant plows the fields-not this kind of animal, but a stupid donkey crosses the bridge-and it's hard to step by step. A stupid boy plays the piano-nonsense plays a pig to eat a tiger-tricks a stupid old lady into going to the henhouse-rushes (stupid) egg monkeys to catch the moon-and works for nothing with a square stick-that's stupid.