1.The conspirators will be foiled in their intrigue.

1.阴谋家阴谋将被挫。

2.He was foiled in his attempt.

2.企图成为泡影了。

3.The German attempt to cow the British nation, or shatter their warmaking capacity and willpower by bombing, had been foiled.

3.德国想轰炸来恐吓不列颠民族其作战能力和作战意志企图，已经破灭。