Because it's difficult and boring.
因为它既难又烦人。
They think English is difficult and boring.
他们认为英语难学且乏味。
The construction work was difficult and boring.
这份建筑工作既艰难又枯燥。
I don't like science, it's too difficult and boring.
我不喜欢做的科学，它是太困难，太无聊。
Never complain about the job and whine about how difficult or boring it is.
绝不要抱怨工作有多难或者是多么无聊。
Never complain about the job and whine about how difficult or boring it is.
绝不要抱怨工作有多难或者是多么无聊。
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