a difficult and time-consuming process
...ime-consuming:taking or needing a lot of time 费时的;耗时间的 a difficult and time-consuming process 困难而又费时的过程 depth:the quality of knowing or understanding a lot of details about something; the ability to provide and explain these...
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a difficult and time-consuming process
这是一个困难而耗时的过程
以上为机器翻译结果，长、整句建议使用 人工翻译 。