backbone：courage，determination
例句：He has a crush on Sally，but he doesn't have the backbone to ask her out.
He has enough backbone to take up the Ice Bucket Challenge.
翻译：He didn't have the backbone and gave up the scholarship at the last minute.
仿写：She didn't have the backbone to contradict her stupid boss in the meeting.
The desperate housewife doesn't have the backbone to go back to work again.
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