to manage by painstaking effort
...olidate at every step; to advance gradually and entrench oneself at every step 惨淡经营 to manage by painstaking effort (idiom) 撤营 to withdraw troops ..
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to manage by painstaking effort
通过艰苦的努力经营
以上为机器翻译结果，长、整句建议使用 人工翻译 。