由于银行对某些少数族裔社区实行红线政策，这些地区的居民很难获得抵押贷款。

Residents in these neighborhoods struggle to get mortgages because banks are ___red-lining minority communities.

老师用红笔在作文上标出了所有需要修改的地方。

The teacher was ___red-lining the essay to show all the corrections needed.

赛车手在直道上经常让引擎保持在红线转速以获取最佳加速性能。

Race drivers often keep the engine at ___red-lining on straightaways for optimal acceleration.