From santa catalina, the pirates left for Panama, approaching by sailing up the Chagres river.

海盗们从圣塔卡塔琳娜出发前往巴拿马，沿着查格雷斯河逆流而上。

And fortunately, the low-lying Chagres river valley provided a natural solution.

幸运的是， 地势低洼的查格雷斯河谷提供了一个天然的解决方案。