where an archerfish can focus on beating the competition. 可以专注于竞争的稳定环境

218. The archer himself...
     弓箭手自己
219. ..becomes the arrow.
     化身为箭
220. Mangroves are unusually stable coastal environments,
     红树林给射水鱼提供了一个
221. where an archerfish can focus on beating the competition.
     可以专注于竞争的稳定环境
222. But on the exposed coast of Mexico's Yucatan,
     但在墨西哥尤卡坦半岛的裸露海岸上
223. life is precarious.
     生命岌岌可危
224. Concentrated by the tropical sunshine,
     在热带阳光的照射下

来自《行星地球 第三季 第一集 Planet Earth S03E01 海岸》第 221 行