她已经成功地将失败抛在身后，不再受影响。

She has managed to put her failures ___behind her.

你需要把过去的错误抛在脑后，继续前进。

You need to put those past mistakes ___behind you.

经过多年的挣扎，他终于将悔恨留在过去。

After years of struggle, he finally left his regrets ___behind.