Sentence examples for has been constantly challenged from inspiring English sources

The limit line, imposed by the U.S.-led United Nations after the Korean War, has been constantly challenged by the North.

The effectiveness of antimalarial drugs, however, has been constantly challenged during the past decades due to the fast evolution of parasites that are resistant to multiple lines of drugs.

Malaria is one of the major causes of mortality around the world and the effectiveness of antimalarial drugs has been constantly challenged during the past decades due to the fast evolution of parasites that are resistant to multiple lines of drugs.

Especially, the validity and reliability side of SDSS have been constantly challenged by many scholars.

I have been constantly challenged.

It has been constantly exciting to watch.

"My rise has been constantly fighting.

Most had been constantly hungry.

Humans have been constantly evolving.

"We have been constantly battling against that".

During the last decade endoscopic surgical procedures have been constantly evolving.