挑战与机遇并存，困难与希望同在。
Challenges and opportunities coexist, as do hardships and hopes.
我国加入WTO之后，机遇与困难同在，挑战与希望并存。
After China joining in WTO, opportunities are together with difficulties, while challenges and hope are coexistent.
从初中到高中的“过渡期”是人生一个重要转折点，困难和希望同在，挑战与机遇并存。
From the junior middle school to the high school "the transition-period" is a life important turning point, the difficulty and the hope with in, the challenge and the opportunity coexist.
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