他正在向客户推销他的新产品方案。

He is ___pitching his new product proposal to the clients.

他在训练时专注于改进投球技巧。

He focused on improving his ___pitching skills during practice.

他们在山脚下搭起了帐篷。

They are ___pitching their tent at the foot of the mountain.

小船在汹涌的海浪中上下颠簸。

The small boat was ___pitching heavily on the rough waves.