out of sight简单

(46) They sometimes travel more than sixty miles to find food or water, and are very good at working out where other elephants are — even when they are out of sight.

（46）它们有时会跋涉六十多英里去寻找食物或水源，而且非常善于判断其他大象的位置——即使在看不见对方的时候也是如此。