它具有挑战性，但它的工作。

It's been challenging, but it's working.

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它具有挑战性是因为它要求你承担风险，要把自己置身于经过你的努力既可能成功也可能失败的情况下。

It is challenging because it asks you to take a risk, to put yourself in a situation where you can succeed or fail in your effort to make a difference.

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住房建筑商可能会发现铝加工，因为它具有挑战性需要氩弧焊或米格进程，更难以超过CroMo或碳焊接钢使用相同的过程。

Home builders may find aluminum fabrication challenging as it requires a TIG or MIG process and is more difficult to weld than CroMo or carbon steel using the same process.

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