加上: plus, to put in, to add, to add on, to add into, in addition, on top of that...
茫茫: boundless, vast and obscure...
一头: one head, a head full of sth, one end (of a stick), one side, headlong, directly, rapidly, simultaneously...
收入: to take in, income, revenue...
家务: household duties, housework...
大自然: nature (the natural world)...
上限: upper bound...
流: to flow, to disseminate, to circulate or spread, to move or drift, to degenerate, to banish or send into exile, stream of water or sth resembling one, class, rate or grade...
重复: to repeat,to duplicate, repetition...
见义勇为: to see what is right and act courageously (idiom, from Analects); to stand up bravely for the truth, acting heroically in a just cause...
