backbone

backbone:courage and determination,勇气，胆量, 不可数名词

（backbone:脊柱，脊骨;支柱,骨干）

have the backbone to do something

有勇气做某事

（have enough/no backbone to do something）

1.He has a crush on Sarah, but doesn't have the backbone to ask her out.

2.Nobody on the Chongqing bus had the backbone to intervene and prevent the middle-aged woman from assaulting the driver. If somebody did, the story would have turned out very differently.

2.He has enough backbone to take up the Ice Bucket Challenge.   

翻译：

他没有胆量，在最后一刻放弃了奖学金申请。

He didn't have the backbone and gave up the scholarship application at the last minute.

没有胆量：lack the backbone

造句:Unfortunately, I have no backbone to disagree with my mentor at times.