power arm

例句：

1. 1. The president's power arm is the key to his success.
   总统的权力臂膀是他成功的关键。
2. 2. The soldier's powerful arm was able to lift the heavy box.
   士兵强壮的手臂能够举起那个沉重的箱子。
3. 3. The scientist's strong arm helped them solve the complex problem.
   科学家强有力的手臂帮助他们解决了这个复杂的问题。