Examples of using "これだけだ" in a sentence and their english translations:
- Yea, that's all it is.
- Yes, it's just this.
This is all I have to say.
This is all I can do.
This is what I can do for you.
That... is all that remains of that trolley system.
This is all the air that is available to us.
This is all you have to do now.
This guidebook is the only one I found to be really useful out of all the ones recommended to me.