outer wall

基本解释

A man is silhouetted against the outer wall of a church in the colonial town of San Miguel de Allende in central Mexico.
中墨西哥殖民城市聖米格爾阿連德，一名男子的剪影映在一座教堂的外牆上。
Most antibiotics directly attack the microbes that make us ill. Penicillin, for example, weakens bugs’ tough outer wall to the point that many of them simply explode.
大多數的抗生素直接攻擊使我們致病的細菌，比方說磐尼西林，能使細菌的堅靭的細胞外壁軟化到一定程度，然後使它們中的大多數簡單地脹爆死掉。
The original ring was a tree-lined boulevard that traced the path of the city’s ancient outer wall.
最初的環城公路是沿這座城市古老外牆的路逕建成的林廕大道。

The text says they "cowered like dogs crouched against the outer wall.
書上寫道“像狗一樣,踡縮在牆角。
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Many sections of the outer wall still stood, places where the brick had managed to stand up to the falling debris.
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You can bounce of certain parts of the outer wall (the yellow parts), but others (err, the red walls) will cause your instant death.
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