The practical structural design is a very complicated process.

实际的结构优化问题是一个极其复杂的过程。

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The invasion and metastasis of tumor is a very complicated process.

肿瘤侵袭和转移是一个相当复杂的过程。

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Research has showed that communication is a very complicated process.

研究表明，人际交流是一个非常复杂的过程。

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"It's a very complicated process, and I don't think necessarily not having a trilateral meeting should be read as anything other than that it just didn't work out, " he told the TV station Monday.

CNN: Bush: Talking to 'terrorists' like talking to Nazis before WWII

"It would be a long and very complicated process because of the extraordinary significance of this landmark, " said Vin Cipolla, president of the Municipal Art Society of New York, a nonprofit advocate for historic preservation and urban planning.

WSJ: Bridge Traffic On Walkway Stirs Concern

The problem -- the issue here is the debt ceiling has to be raised, and it cannot be held hostage to a process that is very complicated and difficult.

WHITEHOUSE: Press Briefing