dare not go one step beyond the (prescribed) limit; dare not exceed the utmost limits one can go; keep within the bounds
Example Sentences:
1.
Relatively scientific persons regard taboo as nonsense , claiming that it should be abolished due to its feudalistic and superstitious residue . on the contrary relatively ignorant persons still tend to have a blind faith in taboo ' s mysterious power 而那些缺乏起码文化素质的“文盲”或“科盲” ，则觉得禁忌事象神秘莫测，难解其详，进而成为跪拜于它的脚下的温驯奴隶，受其左右，不敢越雷池一步。
