They had faced one difficulty after another with bravery and dedication.
他们曾以勇敢与执著面对了一个又一个困难。
The pioneers are courageous indeed, overcoming one difficulty after another.
这些开拓者的确有勇气，他们克服了一个又一个的困难。
Thee pioneers are courageous indeed, overcoming one difficulty after another.
这些开拓者的确有勇气，他们克服了一个又一个的困难。
The medical workers overcame one difficulty after another in their long-term quest for the disease.
在为治疗这种疾病而进行的长期探索中，医疗工作者克服了一个又一个困难。
The medical workers overcame one difficulty after another in their long-term quest for the disease.
在为治疗这种疾病而进行的长期探索中，医疗工作者克服了一个又一个困难。
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