extension

size(大小)

1. B2Countable(可数名词)Uncountable(不可数名词)

   The act of making something longer, larger, or more comprehensive; the state of being extended.

   扩展；延伸；扩大；延长

   • The activist campaigned for the expansion of voting rights to all citizens.

     这位活动家为将投票权扩展到所有公民而进行了宣传活动。

   • The city council approved the extension of the public transport system.

     市议会批准了公共交通系统的扩展。

   • The company's success led to a natural extension of its product line.

     公司的成功自然导致了其产品线的扩展。

   More examples

communication(通讯)

1. B2Countable(可数名词)

   A secondary telephone connected to the same line as the main telephone, often within a building or home; a telephone connected to a switchboard.

   （共用一个号码的）电话分机；（号码不同的）电话分机

   • There's a phone extension in the kitchen if you need it.

     如果你需要的话，厨房里有一台电话分机。

   • Please dial the main number and then ask for extension 245.

     请先拨打总机号码，然后转接分机245。

technology(科技)

1. Countable(可数名词)

   The suffix at the end of a computer file name, indicating the file type.

   副档名（电脑档案名称的最后一部分，用于区分档案类型）

appearance(外观)

1. Countable(可数名词)Usually plural(通常复数)

   A piece of artificial hair added to one's natural hair for length or style.

   假发；接发

structure(结构)

1. Countable(可数名词)

   A new section or addition built onto an existing building.

   扩建部分；增建部分

   • The family decided to build an extension to their home to accommodate their growing needs.

     这家人决定在他们的家里建造一个扩建部分，以满足他们日益增长的需求。

1. Before noun(前置形容词)education(教育)

   Designed to supplement or advance regular student work, often involving more challenging or broader tasks.

   延伸的；辅助学习的

   • The teacher assigned extension activities to challenge the advanced students.

     老师布置了延伸活动来挑战进阶学生。

2. Before noun(前置形容词)education(教育)

   Relating to educational programs offered by a university to individuals not enrolled in a degree program.

   推广的；推广教育的

   • The university offers a wide range of extension courses for adults.

     这所大学为成年人提供了广泛的推广教育课程。