You'd better not to muck about any more. You're old enough to get a job.

你别再混日子啦，像你这岁数早该找个活儿干了。

Children will want to muck about but tell them straight off that it isn't very polite.

孩子们可能会胡闹但要直截了当的告诉他们那是不礼貌的行为。

"I do still muck about here sometimes," he said, but I wasn't sure how often that might be.

他说：“在这我有时仍在混日子。”但我不能确定他到底是否常常瞎混。

Users fill the box with about two cups of muck-any sort has the right microbes, though stinkier stuff seems to work better-and some leftovers from the fridge (to feed the critters).

使用者需要在箱子里填满两杯污泥(适合微生物生存的任何垃圾都可以，当然恶臭的垃圾最好不过了)以及一些冰箱里的残汤剩饭(细菌的食物)。

Productivity shouldn't be about pushing through the muck, but enjoying work you love.

不应该看自己不喜欢的事情的生产率，而是看自己喜欢的工作的生产率。

The undisturbed soil samples, including clay, silty clay, silt, sand, muck and mucky soil, come from about ten different legions in China.

试验土类包括粘土、粉质粘土、粉土、砂土、淤泥和淤泥质土，土样来自国内十余个不同地区。