ramparts
n.
（城堡等周围宽阔的）防御土墙( rampart的名词复数 );
防御，保护;
例句:
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A number of staircases ascend from the cobbled streets onto the ramparts.
一段石阶从鹅卵石路上一直向上直通城墙。
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Strengthening the ancient City ramparts, clearing and deepening the choked fosse.
来自R. Graves
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the ramparts and fortifications of the Old Town
旧城区的城墙和城堡
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I climbed to the top of a rise overlooking the ramparts.
我爬到了一个可以俯瞰护城墙的坡顶。
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The sentinels who paced the ramparts announced that the...army was in sight.
来自Ld Macaulay
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Join the fight against filibusters and holds and cloture votes to the ramparts!
来自NEWYORKER