that means it doesn't have to join the fight. 不必和其它蜂鸟争夺食物

121. enables it to reach the places that others can't...
     可以够到其它蜂鸟无法触及的地方
122. ...the top of this flower, where the sweet nectar is produced.
     也就是这种花朵基部的蜜腺
123. It has found a solution
     它找到了解决方法
124. that means it doesn't have to join the fight.
     不必和其它蜂鸟争夺食物
125. And, as each long flower blooms,
     细长的花朵们竞相盛开
126. it gives the swordbill a fresh supply of food all to itself.
     为刀嘴蜂鸟提供了专属的新鲜花蜜
127. But having a beak longer than your body does have its drawbacks.
     不过 喙比身体长也是有缺点的

来自《行星地球 第二季 第三集 Planet Earth S02E03 丛林》第 124 行