求翻译：火山口周围垣墙呈环状包围湖泊，高出水面40~50m，分两个阶梯，从水面至10~ 20m 高处为缓坡，再往上至山顶为陡坡，湖东垣几乎全由花岗片麻岩构成，可见其露头和转石，而很少能见到火山喷发物，直到山顶方能以火山碎屑岩；是什么意思？

The crater Yuanqiang was the ring surrounded by lakes, above the water 40 ~ 50m, two ladder from the surface to 10 ~ 20m height, gentle slope, and then further on to the top of the hill is steep, Lake Higashigaki almost entirely of granitic gneiss, shows the outcrop and turn the stone, and rarely to

crater surrounded by walls, surrounded by a ring-shaped Lake, high out of the water 40 to 50 M, and is divided into two steps from the water, and to 10 to 20 m high slopes, to go back to to the top of steep, almost the entire lake east wall from mud, and rock composition and stone surface, and very

正在翻译，请等待...

Crater wall around the ring surrounded by lakes, high out of the water 40~50m, in two steps, from surface to 10~20m high for mild, further to the peak is on steep slopes, Lake ruins consisting almost entirely of the granitic gneiss, showing its outcrops and float, and rarely can see volcanic ejecta,

Around the crater the wall assumes the ring-like surrounding lake, outdoes water surface 40~50m, divides two steps and ladders, from the water surface to 10~ 20m high place is the gentle slope, again upward to the summit is the steep slope, east the lake the wall nearly all by the flowered hillock g