a drawbridge over/across [river/moat]
drawbridge 是可数名词，常与 over/across 连用，说明吊桥横跨的位置。
The castle has a drawbridge across the moat.
这座城堡有一座横跨护城河的吊桥。
吊桥
可升降的铰链桥(用于防止通行,如跨越护城河,或让船只通过)。；可升起以阻挡通行或让船只通过的桥；只提供有限通道的倾向。；(可开闭的)吊桥
a bridge that can be raised to allow boats or ships to pass underneath or to block passage
指可升起让船只通过的桥，不是悬索桥
可升降的铰链桥(用于防止通行,如跨越护城河,或让船只通过)。
A hinged bridge which can be raised (to prevent its being crossed, as across a moat, or to allow watercraft to travel beneath it).
可升起以阻挡通行或让船只通过的桥
a bridge that can be raised to block passage or to allow boats or ships to pass beneath it
只提供有限通道的倾向。
A tendency to provide only limited access.
The castle's drawbridge was raised every night to keep enemies out.
城堡的吊桥每晚都会被升起，以防敌人进入。
用法提示：drawbridge 是名词，此处指城堡前可开闭的吊桥，作主语。
The workers lowered the drawbridge so the small boat could pass through the canal.
工人们放下了吊桥，让小船能够通过运河。
用法提示：drawbridge 为名词，作动词 lower 的宾语，表示可开闭的吊桥。
Some old cities still have drawbridges that open for large ships.
一些古老的城市仍有可开合的吊桥，供大型船只通行。
用法提示：drawbridges 是 drawbridge 的复数形式，作主语，指多座可开闭的吊桥。
drawbridge 是可数名词，常与 over/across 连用，说明吊桥横跨的位置。
The castle has a drawbridge across the moat.
这座城堡有一座横跨护城河的吊桥。
raise 和 lower 分别是“升起”和“放下”吊桥的常用动词。
They raised the drawbridge to stop the enemy from entering.
他们升起吊桥，阻止敌人进入。
用 up 表示吊桥升起，down 表示吊桥放下，说明当前状态。
The drawbridge is down, so we can cross.
吊桥是放下的，所以我们可以通过。
grammar · medium
易错句子The castle has a suspension bridge.
正确表达The castle has a drawbridge.
中文的“吊桥”既可指城堡前可升降的吊桥，也可指悬索桥，但英语里 drawbridge 特指可升起或放下的桥，suspension bridge 是“悬索桥”。表示城堡护城河上的吊桥时要用 drawbridge。
grammar · medium
易错句子There are two drawbridge at the entrance.
正确表达There are two drawbridges at the entrance.
drawbridge 是可数名词，复数要加 -s；受汉语没有名词复数变化的影响，容易漏掉词尾，但 two 后面必须用复数形式 drawbridges。
grammar · medium
易错句子They opened the drawbridge to let the soldiers cross.
正确表达They lowered the drawbridge to let the soldiers cross.
drawbridge 的典型动作是 raise（升起）和 lower（放下），而不是 open/close。表示让士兵过河或过壕沟时要放下吊桥，所以用 lower the drawbridge。
中文‘吊桥’既可指可开合的 drawbridge，也可指用缆索固定的 suspension bridge。区分要点：drawbridge 能升起或放下让船通过；suspension bridge 是固定桥，靠缆索承重，不能开合。
升起吊桥
The guards raised the drawbridge as the enemy approached.
敌人接近时，守卫升起了吊桥。
放下吊桥
The king ordered them to lower the drawbridge for the messenger.
国王命令他们为信使放下吊桥。
城堡的吊桥
The castle drawbridge was made of heavy oak planks.
这座城堡的吊桥由厚重的橡木板制成。
护城河上的吊桥
They crossed the drawbridge over the moat to enter the castle.
他们穿过护城河上的吊桥进入城堡。
吊桥已升起（阻断通行）
The drawbridge is up, so no one can enter the castle.
吊桥已升起，任何人都无法进入城堡。
draw（拉，牵引） + bridge（桥）
drawbridge 常见于中世纪城堡的入口。
吊桥横跨护城河，可升降以控制通行。
城堡或要塞中与吊桥一同构成防御体系。
吊桥连接大门入口，用于封锁或放行。
吊桥是防御工事的一部分。
升起吊桥；比喻拒绝交流、自我封闭
After the scandal, the company raised the drawbridge and stopped answering questions from reporters.
丑闻之后，公司升起吊桥，停止回答记者的提问。
放下吊桥；比喻敞开心扉或打开大门
The new director lowered the drawbridge and welcomed feedback from every team member.
新主管放下吊桥，欢迎每位团队成员提出反馈。
吊桥心态；指对外界封闭防御的心态
The country's drawbridge mentality made it difficult for foreign investors to enter the market.
这个国家的吊桥心态使外国投资者难以进入市场。
Dictionary facts from ECDICT, WIKTIONARY.