1192047 This is the kind of work that requires a high level of concentration. CK 1 328958 I immediately lost my concentration. fcbond 847144 Concentration is a very simple thing. Source_Benedict_1921 1278502 All it takes is concentration and solitude. Guybrush88 2268469 The prisoners fled from the concentration camp. _undertoad 2958768 Tom's grandfather was a concentration camp survivor. CK 2673453 When were Jews first sent to the concentration camps? Balamax 39265 Even a small sound from the TV interferes with my concentration. CM 42447 It's the sort of work that calls for a high level of concentration. sacredceltic