雅思听力材料：印度洋近海(BBC纪录片)

　　The Indian Ocean - coastal waters

　　The Indian Ocean is the third largest of the worlds oceanic divisions, covering approximately 20% of the water on the Earths surface. It is bounded by Asiaincluding India, after which the ocean is namedon the north, on the west by Africa, on the east by Australia, and on the south by the Southern Ocean

　　As one component of the World Ocean, the Indian Ocean is delineated from the Atlantic Ocean by the 20 east meridian running south from Cape Agulhas, and from the Pacific Ocean by the meridian of 146 east. The northernmost extent of the Indian Ocean is approximately 30 north in the Persian Gulf. The ocean is nearly 10,000 km wide at the southern tips of Africa and Australia, and its area is 73,556,000 km , including the Red Seaand the Persian Gulf.

　　The oceans volume is estimated to be 292,131,000 km . Small islands dot the continental rims. Island nations within the ocean are Madagascar , Comoros, Seychelles, Maldives, Mauritius, and Sri Lanka. The archipelago of Indonesiaborders the ocean on the east.