We have to manage on our own. 我们必须料理自己的事。 Paddle your own canoe. 自己的担子要自己挑。
Too many cooks spoil the broth. 人多坏事。 Shit or get off the pot. 不要占着茅坑不拉屎。
It's part of my job. 这是我分内的事。 Leave it to me. 把它交给我办。
I take full responsibility. 这件事的责任全包在我身上。