为了不吵醒爷爷,我们蹑手蹑脚地上了楼. We crept upstairs so as not to wake our grandfather. 他冒着生命危险救了那个孩子,使所有的旁观者都相形见绌. He saved the child at the risk of his own life which put all those who crowded on to shame. at the risk of one's own life 冒着生命危险 仅供参考,
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