Dog may look fierce but he wouldn't hurt a fly.

我们的狗别看样子凶，其实很温顺。

Finn:I'm not, at all. I wouldn't hurt a fly, Rob! But maybe shooting people on a computer screen seems a bit more harmless.

我一点也不暴力。我连一只苍蝇都不忍伤害，罗伯！或许是因为在电脑屏幕上用枪杀人感觉无伤大雅吧。