and the more difficult it is, the more highly it is regarded.

他们认为， 道路愈艰险愈带劲儿。

It later became apparent that rabbits were developing a degree of resistance to this disease,

后来，明显看出，兔子对这种疾病已产生了一定程度的免疫力，

Men accustomed to struggling for survival against the elements and Indians were bewildered by politicians, bankers and businessmen, and unhorsed by fences, laws and alien taboos.

习惯与大自然和印第安人作斗争以求生存的拓荒者被政客、银行家和商人搞得晕头转向，最后被圈地、尖律我外来的清规戒律所击败。

were portrayed to stir the imaginations of the superstitious sailors of the day.

以激起当时崇尚迷信的水手们的想像。

But the chances are against it,

但这种可能性很小。

becomes so worn and unreliable that it eventually is not worth mending.

磨损太厉害，老得一点儿也不准了，最终会不值得修理了。