难以言述 meaning in English

my mouth had no way with names

Mr spielberg , one of a number of unpaid artistic advisers to the games , had announced this week that his conscience would not allow him to spend time on olympic ceremonies while “ unspeakable crimes against humanity ” continued in sudan ' s darfur region
斯皮尔伯格是北京奥运会的几名无偿艺术顾问之一，他本周宣布，在苏丹达尔富尔地区“难以言述的反人类罪行”仍在持续的情况下，自己的良心不允许他在奥运会开闭幕式上花费任何时间。