“dubious value”可以造什么句，dubious value造句

Moreover, bribes in India used to be of dubious value, since the recipient would often prove unable or unwilling to fulfil his side of the bargain.

At best, they suggest avenues of research, But by themselves they are of dubious value.

But the insidious culture that allowed Wall Street firms to peddle securities of dubious value to pension funds and charitable endowments remains largely in place.