Sentence examples for historically challenging from inspiring English sources

Approaching highly stable and repeatable ultra-high zTave for Te-free materials has been historically challenging over the past century though exciting progress with zTave well above 1.10 was made recently.

It didn't deliver on projected iPhone and iPad sales, but recorded a rise in service revenue and improvements in sales in China, a market that has been historically challenging for American hardware companies.

Obtaining reliable estimates of mutation rates and the effects of new mutations on fitness has been historically challenging for a number of reasons.

A punishing advertising market and a historically challenging environment for ethnically focused publications left the company constantly searching for additional financing.

Philadelphia had won 10 straight at Lincoln Financial Field before their last two defeats, and in this historically challenging month for Romo's 'Boys they showed that this particular team may be a class above previous failures.

While a number of OCT contrast agents have been previously studied, demonstrations of molecular targeting with such agents in live animals have been historically challenging and notably limited in success.

Here are some facts that even this historically challenged committee would have to acknowledge as accurate.

You get names thrown at you like "historically challenged" or even "stupid".

The figure points to live streaming's potential to be a growth opportunity at a company that's otherwise been historically challenged with regard to signing up new users in large numbers.

The world's largest coal company filed for bankruptcy Wednesday, citing a "historically challenged" market for its carbon-intensive fuel.

We caution in general, however, against regulation of client software, which has historically proven challenging.