But political conflict and public opposition have frustrated attempts to carry out the law.

This attempt, however, is frustrated by Roberto, who arrives just in time to save him.

Without French cooperation, the attempts to relieve these objectives were frustrated.

But once again her attempt to snare him had been frustrated by pressing affairs of state.

However, their attempts at seeking help are often frustrated by unresponsive extended family and social services.

His second attempt to reengineer the planet Saturn had just been frustrated.

Her attempts to get through to her agent were frustrated by the lines being busy.

No camera could penetrate and all attempts at placing recording devices inside had been frustrated.

Any attempt at eliminating a disease could therefore be frustrated by the difficulties and cost in controlling goats.

The properties of large land owners who had been able to frustrate previous attempts were eliminated from the map.