21. He removed the invisible artificial barriers , 22. The biggest thing her mother and I did was not to set up any artificial barriers for Marla. 23. We should not tolerate artificial barriers . 24. We need to remove all the artificial barriers in the market so that our economy is more outward looking. 25. The Berlin Wall was a completely artificial barrier that had no organic connection to the society it was repressing. 26. "With good political will, it is possible to find solutions that would not create artificial barriers , " he said. 27. To mitigate the effect of avalanches the construction of artificial barriers can be very effective in reducing avalanche damage. 28. To explain a Beethoven symphony would be to emasculate it by erecting an artificial barrier between conception and appreciation. 29. On the Main and Neckar, numerous dams and locks were also added, which created artificial barriers for the chain boats. 30. It's a very hard life for us, but it's taken down any kind of artificial barriers in our relationship ."
