里三层外三层 meaning in English

huge crowds of people

" four and five deep ? " asked mrs smith , eyes widened in amazement
史密斯太太眼睛睁得鸭蛋似的，吃惊地问道： “里三层外三层？ ”
As they showed off their latest designs amid the chaos of the beijing auto show this week , crowds swarmed around the stands for the unveiling of each new model
在本周北京车展的一片喧嚣之中，汽车制造商们大肆炫耀其最新设计，熙熙攘攘的参展者里三层外三层地围住展台，观看每款新车型的揭幕。