1. It's a discouragingly familiar strategy.

2. The progress is discouragingly slow .

3. The failure rate on the bar exam is discouragingly high.

4. Taxus L. is a problematic genus, not only its species are discouragingly similar, but also its family circumscription are still doubtful.

5. As we know, developing software in the traditional way is tremendously labor intensive, slow and discouragingly unreliable.