If the regex engine is given the word 'engineering', it will correctly match 'engineer'. The next word boundary, \ b, will not match.

In the cycle of detailed boundary entities recognition and detail feature decomposition, an arbitrary solid model which is represented as B-Rep model can be simplified to any level.

The wide boundary form and its change in the upper and middle parts of layer B"may reflect the corrosion and assimilation of Earth's material in the surroundings by the asthenosphere."