Alternating drills that emphasize heavy usage of the throwing arm with those that are less stressful provides some protection against excessive wear and tear.

交替练习，需要使用投掷臂的练习与那些压力较小的练习交替，提供了一些保护，防止过度磨损和撕裂。

youdao

Obama operatives in the Congress have already introduced 10 bills, if passed, will strip Americans of their 2nd Amendment rights to bare and arm weapons for security, protection, and defense.

奥巴马在国会中的耳目已经提出了10个法案，如果获得通过，它们将剥夺美国人拥有和携带武器用于安全、保护和防御的第二修正案的权利。

youdao

In order to restrict the rising rate of fault current caused by short circuit on one arm of bridge of inverter, a kind of device named current loop protection circuit can be adopted.

为了限制逆变器桥臂直通短路时故障电流的上升率，可以在装置的直流侧安装一种称为“环流保护电路”的附加电路。

youdao

So,as the vaccine was passed from arm to arm, it became less potent, and the length of protection that it would give you varied.

所以当疫苗从一个人传给另一个人之后,它的防治效力会减弱,它带给人的免疫期限也会改变

耶鲁公开课 - 生物医学工程探索课程节选

To offer protection from what he thought was some pretty harmless child's play, he put his arm around his daughter, but still the girl persisted and then started flicking him.

BBC: Bus taunts that sparked Australian racism debate