When required, the glass frontage can be entirely concealed behind a series of protective aluminium shutters, which slide and stack inconspicuously inside a pine box when not in use.
当需要时，玻璃外墙可以完全隐藏在一系列保护性的铝制百叶窗后面，当不使用时，它们可以在松木箱内不显眼地滑动和堆叠。
The shutters of the apartment had been closed for more than a week and the post-box was filled with uncollected mail.
这个公寓的百叶窗一周以来都没有打开过，而门口的邮箱里面都是没人取走的邮件。
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