Double kill: A play in which two outs are made with one pitch.

双杀：用一次投球使二人同时出局。

If he eats the cake, it could kill him; if he refuses it, it will make his wife angry and she will reject him: a double bind.

如果他吃了蛋糕，它足可以要了他的命；如果他拒绝这么做，就会激怒太太而且她就会拒绝接纳他：一个双重约束。

Don't try and double-cross me, Taylor, because I'll kill you.

不要试着出卖我，泰勒，因为我会杀了你。

Let us look at an idiom: kill two birds with double-edged sword.

我们再看一个成语：一举两得/一箭双雕。

In his new book, the Girl in Alfred Hitchcock's Shower, Graysmith suggests that Kenneth Dean Hunt was a Psycho obsessive who wanted to kill Leigh's body double but got the stand-in by mistake.

在他的新书《阿尔弗雷德·希区柯克浴室中的女人》中，肯尼斯·迪恩·亨特被影射为一个人格分裂患者，他想要杀掉李的身体替身，但却误杀了她的替身演员。