/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: EwelinaJanuszPatyk https://cdn.slidesharecdn.com/profile-photo-EwelinaJanuszPatyk-48x48.jpg?cb=1715251508 A learned man is an idler who kills time with study. Beware of his false knowledge it is more dangerous than ignorance