The most convincing explanation is that when someone is finding it difficult to understand what is said to them, he/she engages in a form of lip-reading: he/she will observe the lips of the talker and mimic the talker's lip movements.
Lake Tanganyika is an African Great Lake. It is estimated to be the second largest freshwater lake in the world by volume, and the second deepest, in both cases, after only Lake Baikal in Siberia; it is also the world's longest freshwater lake.
Lake Tanganyika is one of the African Great Lakes. With a depth of 1,470 meters (4,820 feet), it is the second deepest lake in the world, after Lake Baikal. Itâs also the worldâs second largest freshwater lake by volume. Lake Tanganyika is 673 kilometers (418 miles) long, which makes it the worldâs longest lake.