困难 - 艰巨的任务

with difficulty or extra effort

to start to deal with an inevitable challenge or difficulty

something so unpleasant that a person has to struggle to accept it

not difficult in words compared to how difficult it can be in practice

a situation that is complicated, awkward, or annoying

someone or something that is difficult to understand, deal with, or overcome

used to say that something is very difficult and one will need to put a lot of effort into doing it

used to express a sense of uncertainty or nervousness before attempting something

to try to do something that is very unlikely to accomplish

to be very successful that demands a lot of hard work in order to be outdone or surpassed

a very difficult or unreasonable request

used to emphasize that doing something is not easy at all