Thanks to Lostpedia for the transcript.
Welcome to the Island. For your own comfort and safety, we ask that you stay within the confines of your new living quarters. Our barracks are surrounded by a high-frequency sonar fence to protect us from the island's abundant and diverse wildlife. You are now a member of the Dharma initiative.
Every morning you will be given a new code which will allow you to cross outside the fences if you so desire. There are properties on this island that exist nowhere else on earth. Our mission is to study these properties for the betterment of mankind and advancement of world peace. Most of you will be working on the mainland. Should you be assigned zoological study...
Source: Lostpedia