我怎么敢倒下我身后空无人
[wŏ zĕn me găn dăo xià wŏ shēn hòu kōng wú rén]
Translating loosely to 'How dare I fall down when there's nobody behind me?' - conveys the sentiment of being forced to stay strong or not giving up because one stands alone, no one would provide help if one failed.