Sentence examples for presented great difficulties from inspiring English sources

Until the launching of satellites in 1957, Stokes's formula constituted the principal method of determining the form of the geoid, but its application presented great difficulties.

We found that in planta expression of the wild-type HPV-11 L1 gene presented great difficulties and that it was effectively impossible to transform either one of our host plants.

Compared with a previous study in which two crows chose tools of appropriate length, and often longer than was necessary to reach the food [29], it therefore seems that the Sequential tool use task presented greater difficulties.

Furthermore, extraction from seams at great depth i.e., over 1,000 metres (3,300 feet)—presents great difficulties.

The archaic structure of his prose presents great difficulties for the translator, yet even in translation his power is unmistakable.

Determination of organic pollutants in environmental samples presents great difficulties due to the lack of sensitivity and selectivity in many of the existing analytical methods.

Motion generation based on this approach is critical to the utilization of dynamically coupled driving and joint stops, and presents great difficulties.

Use of literature data may occasionally be considered as an alternative source for quantifying background variation, but may present great difficulties both regarding the representativity of the data and the possibilities to discern the different components of variation.

The assembly of structures along continuous boundaries presents great difficulty in the context of modal synthesis.

It can present great difficulty during intubation.

Ignoring the kitchen workers' considerable interaction with customers, urban workers formulated their own visibility to, and interaction with, customers as presenting greater difficulties than kitchen labor, which they viewed as involving little more than chopping.