她是辩论界的王牌选手，每次发言都无人能敌。

She's the ___D-Train of the debate team, no one can match her arguments.

坐D线可以直达布鲁克林市中心。

The ___D-Train goes straight to downtown Brooklyn.

这位运动员现在势不可挡，他正乘着胜利列车（D-Train）。

The athlete is unstoppable right now, he's riding the ___D-Train.