Case closed. 这件事情就此决定, 不必多说.
Period! 言尽于此! I am very decisive. 我是果断的人.
I'm not wishy-washy 我不是三心两意的人. Despite the pros and cons, I'll do it. 虽然有这些优劣点, 我仍然要做. That was a snap decision. 那个决定下得蛮快的.
I don't see why he changed his tune. 我看不出他改弦易辙的原因. Don't change horse midstream. 阵前易将, 兵前大忌.
Just let it be! 随它去吧! 听任它发展吧!
