6.to have nothing to lose(即使不成功也)不会损失什么
They say they have nothing to lose and will continue protesting until the government vetoes the agreement.他们说自己一无所有, 不怕失去什么, 所以会继续抗议直到政府否决协议为止。
7.to lose it<非正式>(get angry)气疯；气急败坏
I completely lost it. I went berserk.我完全气疯了, 暴跳如雷。