Sentence examples for a complex and difficult from inspiring English sources

Development of new vaccines against TB, whether to prevent infection or prevent disease, is a complex and difficult undertaking.

This is a complex and difficult subject..

WASHINGTON — Diabetes has always been a complex and difficult disease.

It's an easy – and desperately obvious – explanation for a complex and difficult to understand problem.

"That is quite a complex and difficult investigation to do," Dr. Hall said.

Discussing the legacy of slavery in America is still a complex and difficult conversation to have.

Asphalt binder characterization is a complex and difficult task due to its rheological behaviour.

And so a complex and difficult strategy was evident on the ground.

A complex and difficult decision, like the one Parliament had to make yesterday.

"That is quite a complex and difficult investigation to do," Dr. Hall said in a telephone interview.

Mr. Chávez, 58, is in Cuba recovering from what officials have called a complex and difficult cancer operation.