Значения термина become problematical на английском

Identification had become problematical, and Dr. Pelletier wanted my opinion.

The questions will become problematical for the civilized world; but the Emperor Napoleon will not make peace.

And, at this stage, the prospect of spending itself out of political trouble by investing heavily in inadequate public services has become problematical.

The successful landing of three bases in suitable positions, sufficiently far apart for advantageous co-operation in geographical, meteorological and other observations, had now become problematical.

She had reckoned on the doctor's money, and possession was becoming problematical.