arm's reach

例句：

1. 1. Theclimber had to exercise great arm's reach to reach the summit.
   攀岩者必须锻炼很大的臂力才能到达山顶。
2. 2. The team's arm'sreach is limited by the distance they haveto cover.
   这个队伍的臂力范围受到他们需要覆盖的距离的限制。
3. 3. The scientist's arm's reach extends tothe outer reaches of the ocean.
   这位科学家的臂力范围延伸到了海洋的最远端。