base

• 指价值、质量或道德上低劣的；也指基础、根本或起点。

Describes something that is low in value, quality, or moral character; also used to refer to a foundation or starting point.

1. Morally low or dishonorableC1formal

   Lacking moral principles; contemptible or cowardly.

   卑鄙

   • His base motives were revealed during the trial.
   • She was shocked by his base behavior towards his colleagues.
   • The politician's base lies were exposed by the media.

   同义词contemptibledebaseddegradeddespicabledishonorableignoblelowmeansordidvile

   反义词dignifiedexaltedhonorableloftymoralnobleprincipledrighteousuprightvirtuous

2. Of low value or qualityC1formal

   Inferior in quality or value; not precious.

   低劣的

   • The coin was made of base metal, not silver.
   • They used base materials for the construction, leading to rapid decay.
   • Base metals like copper and zinc are widely used in industry.

   同义词contemptibledebasedignobleinferiorlowmeanpoorshabbyvileworthless

   反义词admirableelevatedexaltedhonorableloftynoblesuperiorworthy

• 名词，指事物的基础、出发点或主要组成部分，是某物建立、支撑或依赖的根本。

A noun referring to a foundation, starting point, or main component upon which something is built, supported, or depends.

1. Bottom supportA2formal

   The bottom part of an object that supports it and keeps it stable.

   底座

   • The lamp has a heavy metal base to prevent it from tipping over.
   • The statue stands on a marble base.
   • The base of the mountain is covered in dense forest.

   同义词bottomfootfoundationpedestalplinthstandsupport

2. Main locationB1formal

   A place used as a center of operations or headquarters.

   基地

   • The company has its base in New York.
   • The military established a base near the border.
   • The research team set up a base camp at the foot of the glacier.

   同义词campcenterheadquartershome basehubpoststation

   反义词outpostsatellite

3. Foundation or starting pointB1formal

   The fundamental part or underlying principle of something.

   基础

   • Trust is the base of any strong relationship.
   • The theory provides a solid base for further research.
   • A good education forms the base for a successful career.

   同义词basisbedrockcorefootingfoundationgroundworkrootsubstructuresupport

   反义词crownpeaksummitsuperstructuretop

4. ChemistryB2formalscientific

   A substance that can accept hydrogen ions or donate electrons, typically having a pH greater than 7.

   碱

   • Sodium hydroxide is a strong base.
   • The lab technician tested the pH of the base solution.
   • Acids and bases react to form salts and water.

   同义词alkali

   反义词acid

5. A2informalamericansport

   One of the four corners of the baseball diamond that players must touch to score a run.

   垒

   • The runner slid safely into second base.
   • He hit a double and reached third base.
   • The pitcher threw the ball to first base to get the out.

   同义词bagsack

• 动词，表示以某事物为基础、起点或主要依据来建立、支持或发展（如观点、论证、系统等）。

A verb used to indicate the act of establishing or using something as a foundation, starting point, or main support for an idea, argument, or system.

1. Establish foundationB1formal

   To use something as the foundation or starting point for an idea, argument, or system.

   以…为基础

   • The theory is based on years of research.
   • She based her decision on the available evidence.
   • The movie is based on a true story.

   同义词buildestablishfoundgroundpredicaterest

2. Locate or stationB1formal

   To place or establish something in a particular location.

   安置

   • The company is based in New York.
   • They based their headquarters in London.
   • The troops were based near the border.

   同义词establishinstalllocateplacepositionpostsituatestation