Sentence examples for remains difficult to control from inspiring English sources
Although modified live-attenuated vaccines (MLVs) and inactivated vaccines against PRRSV have been available for more than a decade, the disease remains difficult to control.
Progress is being made toward regenerating teeth by seeding dissociated postnatal odontogenic cells onto scaffolds and implanting them in vivo, but tooth morphology remains difficult to control.
Asthma remains difficult to control and can progress in subsets of patients.
Firstly, during the intending process, it remains difficult to control a participant's strategy use.
However, all these methods are essentially based on monochromatic light, and with the chromatic dispersion caused by the ocular media, it still remains difficult to control light delivery of different wavelengths to targeted locations on the retina.
On the other hand, the term "severe asthma" is applied to patients who have refractory asthma and systemic inflammation: it remains difficult to control despite extensive reevaluation of diagnosis and management and also during an observational period of at least 6 months by an asthma specialist [ 10].
Although plant viruses are relatively simple at the genetic level, it remains difficult to prevent or control their spread, and plant viruses can therefore have a devastating impact on crop growth.
Since DNA nanotechnology primarily enables chromophore positioning, and relative chromophore orientation remains difficult to predict or control, rapid prototyping is essential for achieving complex excitonic functionality.
Appropriate timing of source control often remains difficult to determine, but in most severe infections source control should not be delayed.
However, the impact of control efforts remains difficult to measure due to the inherent complexities of HFRS as a disease: multiple viral strains with identified genetic polymorphisms, complex disease manifestation, diverse animal reservoirs, and multiple routes of transmission [ 8].
In the absence of a matched control group it remains difficult to establish to what extent ECMO treatment contributes to the outcome.
