Tom was a farmer. He worked on the farm all day，but sometimes he went to the town market to sell fruit and vegetables. One day, a terrible sound attracted his attention in the town market. He saw a young bull for sale. The bull was white and yellow. It was looking at Tom in fear. Tom walked up and touched its head gently. Just at that time they both seemed to have known each other for a long time. How amazing！Tom bought it at once and called it Amba.

    From then on ， Tom and Amba got on well with each other. But some friends told him that it was dangerous to have such a close relationship with an animal.

    One afternoon， Tom was walking through the forest with Amba. Suddenly， Amba stopped walking and kept pushing Tom with its head. Tom was very surprised and looked around. There was a big snake in front of him. It was beautiful but poisonous. Quickly Amba stepped on the snake's tail with its foot and at the same time Tom picked up a stick and hit the snake's head heavily. Soon the snake died.

    Tom was very grateful for Amba's help. When people heard this, they were shocked at the bull's expression of love for Tom. But for Tom, Amba was not a bull but a member of his family.

已知函数$f\left(x\right)=a{x}^3+b{x}^2+cx+d$在O，A点处取到极值，其中O是坐标原点，A在曲线$y=x^2\sin x+x\cos x,x\in \frac{\mathrm{\pi }}{3},\frac{2\mathrm{\pi }}{3}$上，则曲线$y=f\left(x\right)$的切线的斜率的最大值是（  ）

解释下列句子中划线的文言字词。

①未尝不叹息痛恨于桓灵也____ ②得鱼腹中书，固以怪之矣____

③公输盘为楚造云梯之械____  ④媵人持汤沃灌，以衾拥覆____