at length   (TTS發音)

1. finally； at last最後；終于

    He succeeded at length. 他終于成功了。

    At length there was a step forward in the negotiations. 談判終于有了進展。

    He came at length. 他終于來了。

2. in great detail詳盡地

    The two foreign ministers discussed the situation in this area at great length. 兩位外長詳細討論了這一地區的局勢。

    The teacher explained the text at length，教師詳細地解釋了課文。