三层书柜
Three bookcases
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他把手伸到书柜的第三层，取下一本词典。
He reached up to the third shelf of the bookcase and took down a dictionary.
youdao
书柜分三层，我把最厚的书放在最上层。
The bookcase has three layers. I put the thickest books on the upper layer.
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模块上移
模块下移
不移动