H-23：have no back bone 性情懦弱

A：What do you think of Frank?

A:你认为弗兰克这人怎么样?

B:He's all right. But I think he seems to have no back bone.

B：他人挺好，就是好像性情有点懦弱。

A:Why do you say that?

A:你为什么那么说昵?

B:Whenever things get tough, he gives in.

B：每当事情变得棘手时，他就会屈服。