I consider this to be of dubious value for two reasons?

我认为这是令人怀疑的价值有两个原因？

youdao

For writing—being a writer—always seems to the writer to be of dubious value.

而写作——乃至做一个作家——则总是让你怀疑它的价值。

youdao

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

他们最多不过是建议了研究方向，但他们自己也不知道是否正确。

youdao

Some suspect that its opposition stems from the fear that many expensive and profitable pills would be found to be of dubious value.

ECONOMIST: Developing new drugs

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.

NEWYORKER: What Good Is Wall Street?

Since most digital advertising is a total numbers game, it might take a while for agencies and their clients to realize what portion of their Like-spend is going to acquire fans and attendent search results of dubious value.

FORBES: Facebook Graph Search Runs On Likes That Advertisers Have Already Paid For