1." An accident happens so easily. Be careful! Your horses perhaps are mettlesome" .

" 小心上飞来！你的马驯不驯服呀？"

2.The superstratum of timidity which often overlies those who are daring and defiant at heart had been passed through, and the mettlesome substance of the woman was reached.

那些外羞怯的人往往掩盖着内心的勇敢和无畏，此时这层外已被穿透，这个女人又变得有气魄起来。

3.They were all healthy, thoughtless young animals, sleek, graceful, high-spirited, the boys as mettlesome as the horses they rode, mettlesome and dangerous but, withal, sweet-tempered to those who knew how to handle them.

他们都是年轻、健康而毫无思想的动物，也同样圆、，两个小伙子和他们所骑的马一样精神，但都带有危险性，可同时对于那些知道怎样驾驭他们的人又是可爱的。