Sentence examples for a very puzzling issue from inspiring English sources

The presence of a poorly expressed class Ib enzyme in S. Typhimurium and Enterobacteriaceae in general has been a very puzzling issue since it was first described [32].

And that's a very puzzling number.

"The world is a very puzzling place: if you're not willing to be puzzled, you just become a replica of someone else's mind".

Then she gave me a very puzzling instruction: "Get back on the gluten".

And this is still a puzzling issue for us.

At the highest energies, the sources and the mechanisms by which cosmic rays are generated and/or accelerated are still a puzzling issue for today's astrophysicists.

It is a puzzling issue found in the field of Supervisory Control and Data Acquisition (SCADA) to read automatically the indication of analog measuring instruments, which collects many states of power system equipment.

A puzzling issue remains what to call people going from their homelands to other countries, and under what conditions.

How such features changed during evolution remains a puzzling issue.

It is a very emotive issue.

It's a very serious issue".