初中英语牛津九年级上册课本06

[15:46.00]Not enough sleep can,therefore,cause problems with storing information.
[15:53.76]In addition,being tired will stop you from being able to concentrate well.
[16:01.31]Caffeine in tea and coffee
[16:05.75]are very good at preventing sleepines helping concentration,
[16:12.80]but they can also cause problems with memory.
[16:18.86]In order to concentrate well, you must be relaxed.
[16:24.82]Generally keeping fit and regular health checks are both important as well
[16:32.26]not just for improving your memory.