So they have to conquer the discomfort caused by many-ball training.

多球训练有利于增强专项身体素质。

youdao

For economic and training ease, Sienar retained the ball-shaped TIE cockpit and many of the control interfaces, but souped up the TIE's performance to impressive levels.

考虑到经济和训练的难度，西纳保留了球形tie驾驶舱和许多控制界面，但将其性能提高到一个惊人的层次。

youdao