keep on the rails

基本解釋

By taking a constant interest in his son's progress, he helped to keep him on the rails when so many other young men were falling foul of the law.
他一直關注著兒子的成長；當許多別的年輕人違法犯案時，他總是促使他安分守已。
They need a certain amount of weight in order to keep a tight grip on the rails.
它們本來就需要相當?shù)闹亓縼硎棺约壕o緊咬合住鐵軌。
Fortunately, some well-staged action scenes and an emphatic performance from former television star Zo In-sung as a nice guy in a nasty line of work keep A Dirty Carnival on the rails.
幸運的是，精心設計的動作場面和明星趙寅成強有力的表演使本片取得了不俗的成績。

So far, however, it lacks the heavy hitters—such as former American presidents—who might loosen the purse-strings and keep projects on the rails.
ECONOMIST: International aid
Outside intervention might yet keep the talks on the rails.
ECONOMIST: America at a loss
Two railway watchdogs, the Eisenbahnbundesamt (EBA) and the Bundesnetzagentur (BNetzA), try to keep DB on the rails, by checking how it manages such conflicts of interest as it allocates routes, sets timetables and schedules repairs.
ECONOMIST: German railways