1
be the rudder of sth
这里的 rudder 是比喻用法，指指导原则或核心方向。
The constitution is the rudder of the nation.
宪法是国家的指导原则。
舵；方向舵
先理解核心含义，再看它在真实句子里的用法。
舵；方向舵
a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes
The constitution is the rudder of the nation.
宪法是国家的指导原则。
用于操控船只的水下舵板,通过舵轮、舵柄或其他装置控制(现代船只甚至可用操纵杆或自动驾驶仪)。
An underwater vane used to steer a vessel. The rudder is controlled by means of a wheel, tiller or other apparatus (modern vessels can be controlled even with a joystick or an autopilot).
安装在飞机尾部的铰接垂直翼,用于改变水平航向
a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes
固定翼飞机或旋翼机垂直尾翼上的操纵面,某些飞行器整个垂直尾翼即舵面,由脚蹬控制。
A control surface on the vertical stabilizer of a fixed-wing aircraft or an autogyro. On some craft, the entire vertical stabilizer comprises the rudder. The rudder is controlled by foot-operated control pedals.
(航海)由安装在船尾的铰接垂直板组成的转向装置
(nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel
The pilot moved the rudder to the right to make the plane turn gently.
飞行员向右移动方向舵，使飞机缓缓转向。
The rudder at the tail of the aircraft helps the pilot keep the nose pointing straight when a strong wind blows from the side.
飞机尾部的方向舵帮助飞行员在侧面强风吹来时保持机头朝向正前方。
Before takeoff, the mechanic checked the plane's rudder and found that it moved freely.
起飞前，机械师检查了飞机的方向舵，发现它活动自如。
这里的 rudder 是比喻用法，指指导原则或核心方向。
The constitution is the rudder of the nation.
宪法是国家的指导原则。
act as a rudder 强调在某事物中起引导或定向作用。
The steering committee acts as a rudder for the whole project.
指导委员会充当整个项目的方向舵。
在飞机上，rudder 是垂直尾翼上的可动部分，用于控制水平方向的转向。
The pilot steers the aircraft with the rudder.
飞行员用方向舵操纵飞机。
Not this
Use rudder to turn the plane.
Use this
Use the rudder to turn the plane.
rudder 是可数名词单数，不能单独使用，前面需要冠词或限定词。中文没有冠词，学习者容易漏掉 the；这里特指飞机的方向舵，所以应加 the。
Not this
The airplane's rudder locates at the tail.
Use this
The airplane's rudder is located at the tail.
locate 是及物动词，表示“把…设置在某处”；描述“位于”时应使用被动语态 be located。中文“位于”没有被动态标志，所以学习者会用主动形式，造成语法错误。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
船舵
The ship's rudder was damaged in the storm.
船的舵在暴风雨中损坏了。
飞机方向舵
The aircraft rudder is used to control yaw.
飞机方向舵用于控制偏航。
转动船舵
The captain turned the rudder sharply to avoid the rock.
船长猛地转动船舵以避开礁石。
方向舵踏板
The pilot used the rudder pedals to keep the plane straight.
飞行员用方向舵踏板保持飞机直线飞行。
道德准则
She has a strong moral rudder to guide her decisions.
她有坚定的道德准则来引导自己的决策。
掌舵；掌管；领导
With a new manager at the rudder, the team finally met its targets.
在新经理的掌舵下，团队终于实现了目标。
接手掌管；接手领导
After the founder retired, her daughter took the rudder and transformed the company.
创始人退休后，她的女儿接手掌管并改造了公司。
稳定局面；稳住形势
The chairman's calm leadership helped steady the rudder during the crisis.
董事长冷静的领导力帮助在危机中稳定了局面。
再看那些船只：虽然船身如此巨大，又被强风催逼，却只靠一个很小的舵来顺从掌舵者的意思行驶。
James 3:4 of the Bible uses the image of a small ship's rudder to show that something tiny, like the tongue, can control the entire direction of a person's life.
《圣经》雅各书 3:4 以船上小小的舵来形容，小小的东西——比如舌头——也能左右一个人生命的整个方向。
Use rudder naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：rudder 中间的 ‘dd’ 像两片舵板，挂在船尾左右摆动，船就转向。
语域：mixed 常见场景：aviation、flight training、aircraft maintenance 该义项指飞机尾部的方向舵，属于航空领域的专业术语，多出现在飞行手册、操作说明及飞行训练等场合，也用于飞行员之间的交流。日常一般对话中较少使用，正式程度介于正式与中性之间。
Genuine rhymes (all /ʌdɚ/): udder, shudder. Watch out: ruder /ˈruːdɚ/ and rider /ˈraɪdɚ/ look similar but do not rhyme with rudder.
Dictionary facts from ECDICT, WIKTIONARY.