Sentence examples for very difficult to observe from inspiring English sources

Individual planets around other stars i.e., extrasolar planets are very difficult to observe directly because a star is always much brighter than its attendant planet.

"A crack is very difficult to observe visually," said Steven J. Fenves, a guest researcher at the National Institute of Standards and Technology, part of the Commerce Department, and a professor emeritus of civil engineering at Carnegie Mellon University.

It is important to note that this accelerated soil loss is equivalent to less than 1 mm (0.04 inch) of soil depth, making erosion damage very difficult to observe over short time spans.

Our models are conservative in the sense that they invariably predict slow steady trends, typically very difficult to observe over, say, a 9-year period, so this question comes up automatically for just about anything that we see that is big and fast.

"When you are farming in aquaculture it is very difficult to observe the animals you are growing.

However, it is often very difficult to observe a system of collective problem solving by observing every individual action.

The short oestrus period and the fact that mating can be tightly synchronized within a population make copulations very difficult to detect and observe [25], [34].

65 82 These kinds of teams are called 'ad hoc' on-call teams and are very difficult to follow and observe in the real clinical setting, and assessment of the clinical performance of ad hoc teams for a long period is almost impossible.

It's very difficult to discover".

In addition to that, the differences from one sample to another in different pathological conditions are very small and difficult to observe in raw spectra.

However, as it can be seen from Fig. 5b, it is very complex and difficult to observe the image of a polymer shell homogenously coating the nanoparticle surface, due to overlap in three dimensions of particle structures [66].