Word · Frequency #29824
protractors
量角器；分度器
protractors is the plural of protractor.
核心释义
a drafting instrument used to draw or measure angles
- 1.
拖延者或导致延长的事物。
One who, or that which, protracts, or causes protraction.
- 2.
量角器
drafting instrument used to draw or measure angles
- 3.
用于绘制或测量角度的圆形或半圆形工具。
A circular or semicircular tool for drawing or measuring angles.
- 4.
旧时用于从伤口中取出异物或有害物质的器具。
An instrument formerly used in extracting foreign or offensive matter from a wound.
- 5.
使器官或部位伸出的肌肉,与牵缩肌相对。
A muscle that extends an organ or part; opposed to retractor.
- 6.
裁缝用的可调式样板。
An adjustable pattern used by tailors.
拖延者或导致延长的事物。；量角器；用于绘制或测量角度的圆形或半圆形工具。；旧时用于从伤口中取出异物或有害物质的器具。；使器官或部位伸出的肌肉,与牵缩肌相对。
用法In use
I used a protractor to measure the angle of the triangle in my math homework.
用法提示：protractor 在此作名词，指用来量角度的工具“量角器”。
The teacher handed each student a protractor so they could draw accurate angles for the geometry test.
用法提示：此处 protractor 为可数名词单数，表示画角或量角的器具。
Could you pass me the protractor? I need to check whether this corner is exactly ninety degrees.
用法提示：protractor 用作名词，指量角器，用于测量角度大小。
use a protractor to do sth
protractor 是可数名词，表示“量角器”，常用于 use ... to ... 结构。
Use a protractor to measure the angle.
用量角器来测量这个角度。
do sth with a protractor
相关词与表达Connections
搭配Collocations
- use a protractor
- 用量角器
- Use a protractor to measure angles accurately.用量角器精确测量角度。
- measure an angle with a protractor
- 用量角器测量角度
- She measured the angle with a protractor and wrote down 60 degrees.她用 量角器测量了角度，并记下了60度。
- draw an angle using a protractor
- 用量角器画角
- Draw a 45-degree angle using a protractor.用量角器画一个45度角。
- a semi-circular protractor
- 半圆量角器
- A semi-circular protractor is usually made of clear plastic.半圆量角器通常由透明塑料制成。
- the degree scale on a protractor
学习提示Learner notes
记忆技巧Memory Tip
联想 pro（向前）+ tractor（拖拉机）：拖拉机转弯时，用量角器量角度。
语境与语域Context & Register
语域：neutral 常见场景：数学课堂、几何绘图、工程制图 指量角器时属于中性常用词，通常用于数学课、几何作图或制图场景。
发音与拼写Pronunciation & Spelling
These five words share the spelling chunk -tractor and rhyme with protractor in the stated British-style pronunciation: tractor /ˈtræktə/, extractor /ɪkˈstræktə/, retractor /rɪˈstræktə/, detractor /dɪˈstræktə/, contractor /kənˈtræktə/. Note that contractor is often pronounced with stress on the first syllable in American English (/ˈkɑːntræktər/). Spelling lookalikes projector /prəˈdʒektə/ and protector /prəˈtektə/ do not rhyme with protractor because their stressed vowel and following sounds differ.
一起学习词形Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.