And this threat of punishment keeps you on the straight and narrow.

惩罚的威胁让你一直遵纪守法，不敢胆大妄为。

With all these temptations around me, I find it increasing difficult to keep to the straight and narrow.

由于我周围有这些诱惑，我越来越难于遵守道德方面严格的行为准则。

My wife helps me stay on the straight and narrow.

我妻子帮助我坚持坦荡正直地做人。

Just as hospitals will not receive funding for patients readmitted within a month of their discharge, these providers will be rewarded for keeping ex-cons on the straight and narrow.

正如医院不能收取一个月之内再次入院的病人的费用一样，这些提供帮助的机构如果仅仅是确保这些人安分守己，也不会得到任何奖励。

He will intervene in public debates and write more books, all in his quest to keep Singapore on the straight and narrow.

他会加入到公共领域的争论中，出更多的书，总之会竭尽所能让新加坡走在良性发展的道路上。