这几句怎么理解

这几句怎么理解？ Biologists who wish to study such things as bee navigation,language,and behavior in general have to train their bees to fly from the hive to special places. to do this, they begin by placing a source of suger very close to the hive so that the bees can learn what the game is about.Then, at regular intervals, the dish or whatever is moved progressively farhter and farther from the hive in increments(增长）of about 25percent at each move. Eventually, the target is being moved 100 feet or more at a jump, very far form the hive. sooner or later, while this process is going on, the biologists moving the dish of sugar will find the bees out there waiting for them,exactly where the next position had been planned.This is an uncomfortable observation to make.
从to do this,后一直到结尾，这个过程我看不懂，请翻译下，progressively ， at a jump在文章里什么意思？
   

参考案 progressively farther 不断递增的，一步比一步远

at a jump 大幅度地飞跃

说明一下，因为每次比上次距离多移25%，所以每次移动的距离是不断递增的（progressively），开始几次可能没移动多远，到后来一次就大幅度地移出100英尺。但是蜜蜂一直都能精确地估算下次移动到达的位置，提前去等着。