1.支柱，脊柱，骨干力量

2.勇气，骨气

3.courage and determination

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

Will he have the backbone to tell them what he thinks?

have the backbone to do something.

翻译

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

abandon,give up, quit

abandon

1. to leave a place, thing or person forever

2.to stop doing an activity before you have finished it

quit

to stop doing something or leave a job or a place

give up

1.to stop trying to guess

2. to stop doing something before you have finished it, usually because it is too difficult

3.If you give up a habit, such as smoking, or something such as alcohol, you stop doing it or using it

造句

在课堂上没人敢打断老师说话.

Nobody in class have the backbone to interrupt the teachers' speach.