ravelin
「ravelin」的意思
n. 半月堡；三角堡
n.(城墙的)半月堡
「ravelin」的用法
ravelin一种中世纪的防御工事，通常由一个尖塔和围绕它的城墙组成。 - 军事历史
「ravelin」的例句
The castle was equipped with a ravelin to protect its vulnerable sides.
城堡配备了吊桥以保护其易受攻击的侧面。
During the siege, the attackers tried to breach the ravelin but were repelled.
在围攻中，攻城者试图突破吊桥但被击退。
The ravelin provided a strong defensive position for the defenders.
吊桥为守军提供了坚固的防御位置。
Historians often study the layout of ravelins to understand military strategies.
历史学家经常研究吊桥的布局以了解军事策略。
The design of ravelins evolved over time to improve their effectiveness.
吊桥的设计随着时间的推移而演变，以提高其有效性。
In modern warfare, similar defensive structures are sometimes used.
在现代战争中，有时会使用类似的防御结构。
Ravelins were an important part of medieval fortifications and siege tactics.
吊桥是中世纪要塞和攻城战术的重要组成部分。
The engineers who designed the ravelin had to consider both strength and accessibility.
设计吊桥的工程师必须同时考虑强度和可访问性。
The ravelin was a significant improvement over previous defensive structures.
吊桥比之前的防御结构有了显著改进。
During the battle, the enemy's attempts to scale the ravelin were met with fierce resistance.
在战斗中，敌人的尝试攀登吊桥被激烈的抵抗所阻止。