[word=considerable] [!□] □ □
[word=considerable] [!(□ | □)] □ □
[word=considerable] [!(□ & □)] □ □
Effective teaching methods , particularly in transferable skills training , place considerable demands on staff time and availability and hence sufficient staff numbers should be seen as a principal resource requirement . At the same time , the old social problems , typical of industrial economies , have not disappeared , and continue to put considerable demands on welfare states . Quality running / jogging shoes will be required as cadets run considerable distances on pavement . The combined thin client solution and Red Hat Enterprise Linux from LinuxIT has not only enabled us to make considerable savings on software licences , but also made staff more motivated and satisfied because their computer systems are just so much faster and more reliable . Flexible timetabling places considerable demands on staff in terms of lecturing , with lectures for preliminary level modules being repeated three times a week . At a time when we were still quite unfamiliar with the subject of conditioned reflexes , we met in some of the experiments with considerable difficulties on account of a drowsiness , which developed from the use of certain conditioned stimuli and under certain conditions of experimentation , and which we were not able to overcome .