All this was just designed to frighten me and keep me in line.

所有这一切只是设计来吓唬我、让我守规矩。

《柯林斯英汉双解大词典》

Just keep going in a straight line ; you can't miss it.

照直走，你不会找不到那地方的。

《牛津词典》

They work in pairs, partly for safety, partly to keep each other in line.

为安全起见，他们分成几组，成对的工作，互相联系保持协调。

youdao

The problem for lawmakers: How to keep U.S. businesses in line without preventing them from keeping up with foreign competition abroad.

FORBES: Grilling Yahoo!

"Old case law is fairly narrow about treating something as substantially identical, but the problem for the adviser and the investor is that the IRS may take more aggressive positions, " says Stevie Conlon, tax director for Gainskeeper.com, which provides software to advisers that helps them keep clients in line with the wash sale rule.

FORBES: Magazine Article

The implication is that game companies need to keep a constant eye on their customers to keep them in line.

FORBES: Rumors Suggest the Next Xbox and Playstation Consoles Are All About Controlling Consumers