backbone

翻译：他没有胆量，在最后一刻放弃了奖学金申请。

He doesn't have the backbone to give up the scholarship last minute.

造句一：很多时候就是对自己没信心，没有胆量去尝试新事物。

Most of the time no backbone to try the new thing, don't have the confidence to myself.

搭配：可替换courage，可数名词：脊柱  单数名词：支柱    不可数名词：勇气，胆量

have a crush on somebody”是固定表达，意思是迷恋某人。