In earlier times it was necessary to design structural systems suitable for the materials that were available, such as wood, stone, brick.

在早期，有必要设计适合现有的例如木材、石头、砖这样的材料的建筑系统。

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In earlier times it was necessary to design structural systems suitable for the materials that were available, such as wood, stone, brick.

在早期，有必要设计适合现有的例如木材、石头、砖这样的材料的建筑系统。

youdao