zài / méi / yǒu / rèn / hé / bāng / zhù / de / qíng / kuàng / xià / wán / chéng / zhè / xiàng / rèn / wù / bǐ / dēng / tiān / hái / nán

在没有任何帮助的情况下完成这项任务，比登天还难。

Completing this task without any help would be extremely difficult.