用dubious value造句子，“dubious value”造句

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.

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

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.