Sentence examples for ones is difficult from inspiring English sources

To our knowledge, this is the first study demonstrating sex-differences in pre-symptomatic changes in the R6/1 model for HD, although comparing our results with previous ones is difficult, since most studies on the R6/1 model have employed either only male or female animals or, when mice of both sexes were used, did not examine or describe the interactions between genotype and sex [80] [80].

So optimising existing machines or designing new ones is difficult and expensive.

The researchers noted that cosmetics and personal care products are not well-regulated in this country, and that getting data about health effects from exposure, particularly long-term ones, is difficult.

But pulsars weren't discovered in globular clusters until the early 1990s, and finding new ones is difficult because of the unknown "smearing" of pulses by the interstellar medium.

Allen and Browne [1] hypothesize two main reasons for the non-existence of standards: many study reports are not publicly available and the procurement of the available ones is difficult and time consuming.

Comparing the treatment results of our study and previous ones is difficult because of different case definitions, patient backgrounds, and disease severity, as well as obscure descriptions about complications in SARS patients in previous reports.

Higher ones are difficult to stifle electronically.

Unlike flexible consequences, rigid ones are difficult to imitate because companies need time to build them.

Consequently, comparisons between living forms and Paleozoic ones are difficult, and problems have arisen in classification as well as understanding the interrelationships between past and present forms.

"I see a lot of opals and good ones are difficult to replace," the elder Athanasiadis said.

Either one is difficult on its own, but doing both can be a challenge.