Some hobbies are relatively easy, while others present more of a challenge.

一些爱好是相对容易的，而其他更大的挑战。

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At present, the construction of the project has gained a stage achievement so we must seize the opportunity to meet more challenge.

目前，工程建设已取得阶段性成果，须抓住机遇，迎接更大的挑战。

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At present, more and more patients suffer from bone defects caused by trauma, tumor and bone diseases, which is still a big challenge on the bone-repair therapies of bone defects.

目前因创伤、肿瘤或骨病等原因造成骨缺损的病人越来越多。临床上对大范围骨缺损的修复治疗仍是一个难题。

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But unlike the other Maiden Lane assets already sold by the Fed, the Triaxx CDO is more of a notorious villain of the 2008 financial crisis and may present more of a challenge for banks looking to break it up and sell it off in pieces.

FORBES: The Fed, Wall Street Prepare to Unleash Crisis 2.0

Getting from the present pessimism and distrust of political parties to a more optimistic and secure vision of the future is the real challenge of constitutional reform.

ECONOMIST: Bolivia