But her vagrant mind must be reduced to order: there was an art in self-discipline; and she walked round and round the brown library considering by what sort of manoeuvre she could arrest her wandering thoughts.

但她的流浪思想必须归于有序：自律是一门艺术； 她在棕色的图书馆里转了一圈又一圈， 考虑用什么样的方法可以阻止她胡思乱想。