数十层
Tens of layers
以上为机器翻译结果，长、整句建议使用 人工翻译 。
青少年们爬了数十层楼梯，为困在高层建筑中的老人们送去水和食物。
Teenagers climbed dozens of flights of stairs to deliver water and food to elderly people trapped in high-rise buildings.
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一些牙球有数十层，每层有镂空花纹并能旋转。
Some have dozens of rings or layers, and each ring is carved with hollowed designs and able to revolve.
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