毫不迟疑的英文：
unhesitating

Free from hesitation or vacillation; resolute.
坚定的毫不犹豫的或毫不迟疑的;坚决的

The army did not hesitate.They took the town by storm.
军队毫不迟疑，他们突袭占领该城。

Still he did not hesitate to defend his daughter
然而,他毫不迟疑地保护他的女儿。

Without the slightest hesitation, I gave him a heavy dose of morphia.
我毫不迟疑地给他注射了大量吗啡。

In the rearward, there is a door was closed without mercy because you forcibly close it.
身后的一扇门毫不迟疑地关闭了，那是你用力一甩的结果。