有时很走运碰到的是一只很配合的伙伴，但其他有些时候他们只是到处跳来跳去，跳到半墙高的地方。
Sometimes I strike lucky and I get one which is happy to co-operate with me, but other times they just end up jumping everywhere including half way up the walls.
平遥城墙为明洪武三年(1370年)所建，周长6.4公里，墙高12米左右，外表全部砖砌，墙外有护城河，深广各4米。
Pingyao city wall for the Ming Hongwu three years (1370) built, the circumference of 6.4 km, 12 meters high wall around the appearance of all brick, wall moat, deep and wide 4 meters.
但在实际的工程中，特别是对于糯扎渡这种边墙高、跨度大、洞室相互交错的地下洞室群的围岩稳定性问题，还缺少系统的评价方法。
However, evaluation methods of wall rock stability in underground cavern groups with high side-wall, large span and intersect caverns are required for actual projects such as Nuo Zhadu.
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