Some pretext to introduce the topic at hand. Basically a short preamble.
What is this topic?
the quick brown fox jumps over the little lazy dog. the quick brown fox jumps over the little lazy dog. the quick brown fox jumps over the little lazy dog.
the quick brown fox jumps over the little lazy dog. the quick brown fox jumps over the little lazy dog. the quick brown fox jumps over the little lazy dog. the quick brown fox jumps over the little lazy dog. the quick brown fox jumps over the little lazy dog.
Conclusion
Today we learnt that the fox is quick, and that it jumped over the lazy dog.
References:
https://9to5civil.com/secant-walls/
https://www.designingbuildings.co.uk/wiki/Secant_pile_wall
https://bonperson-civil.com/retaining-wall-shurui/