tractability

这只小狗的温顺让训练变得容易多了。

The puppy's ___tractability made the training much easier.

这匹马因其温顺的性格而成为初学者的理想选择。

The horse's ___tractability makes it an ideal choice for beginners.

这种蜡的易塑性使得孩子们可以轻松捏出各种形状。

The wax's ___tractability makes it easy for children to mold into different shapes.