fall through   (TTS發音)

1. descend accidentally through掉進

    The boy fell through the ice and was drowned.這個男孩掉入冰水中淹死了。

2. fail to be completed，fail to occur失敗；不執行；落空

    If your new agreement falls through，the workers in your company will go on strike. 如果你們的新協議不落實，貴公司的工人就要罷工了。

    I hope the plan doesn't fall through a second time owing to lack of funds. 我不希望這項計劃因缺少資金再次落空。

    We are going on a picnic tomorrow，unless it falls through because of the weather. 我們明天要去野餐，除非天氣不好去不成。