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semi-表示”半”semimonthly /ˌsemimʌnθli/中文释义：半月刊，每月两次的英文释义：happening or published twice a month or once every half month.。

构词：semi-（半）+ monthly（月刊）→ 半月一次的刊物或频率例句：The magazine is published semimonthly, with new issues with new issues released on the 1st and 15th of each month.（该杂志为半月刊，每月 1 日和 15 日发行新刊。

）semicolony /ˌsemɪˈkɒləni/中文释义：半殖民地英文释义：a country or region that is partially controlled by a foreign power, while still maintaining some nominal sovereignty.。

构词：semi-（半）+ colony（殖民地）→ 受外国势力部分控制的地区例句：In the late 19th century, many Asian countries became semicolonies under the influence of Western imperial powers.（19 世纪末，许多亚洲国家在西方列强影响下成为半殖民地。

）semiconductor /ˌsemikənˈdʌktər/中文释义：半导体英文释义：a substance that has electrical conductivity between that of a conductor and an insulator, used in electronic components.。

构词：semi-（半）+ conductor（导体）→ 导电能力介于导体和绝缘体之间的物质例句：Silicon is a common material used in the production of semiconductors for computer chips.（硅是用于生产计算机芯片半导体的常见材料。

）semicircle /ˈsemisɜːrkl/中文释义：半圆英文释义：a half of a circle, or a shape formed by half of a circle.构词：semi-（半）+ circle（圆）→ 圆的一半。

例句：The children sat in a semicircle around the teacher to listen to the story.（孩子们围成半圆坐在老师周围听故事）semiautomatic /ˌsemiaʊˈtæmætɪk/。

中文释义：半自动的英文释义：requiring some manual operation or intervention, while partially automated.构词：semi-（半）+ automatic（自动的）→ 部分自动、部分需人工操作的。

例句：The old washing machine is semiautomatic, so you have to switch between washing and rinsing cycles manually.（这台旧洗衣机是半自动的，需要手动切换洗涤和漂洗程序。

）semiannual /ˌsemiˈænjual/中文释义：半年一次的，一年两次的英文释义：occurring twice a year or once every six months.构词：semi-（半）+ annual（年度的）→ 每半年发生一次的。

例句：The company holds semiannual meetings to review its financial performance.（该公司每半年召开一次会议，审核财务状况）semidetached /ˌsemidɪˈtætʃt/。

中文释义：半独立式的（房屋）英文释义：describing a house that is joined to another house on one side but separate on the others.。

构词：semi-（半）+ detached（独立的）→ 一侧与他屋相连、另一侧独立的房屋例句：They bought a semidetached house to save money while still having some privacy.（他们买了一栋半独立式住宅，既省钱又能保有一定隐私。

）semiprofessional /ˌsemiprəˈfeʃənl/中文释义：半职业的英文释义：involving people who work in a profession or activity for some pay, but not as their main occupation.。

构词：semi-（半）+ professional（职业的）→ 非全职的职业性活动或人员例句：He plays semiprofessional football while working as a teacher during the day.（他白天当老师，业余时间参加半职业足球比赛。

）备注说明构词规律：semi- 作为拉丁前缀，核心词义为 “半”，通常与名词、形容词相结合，从而构成兼具有 “部分” 和 “不完全” 含义的词汇（如 semiautomatic 表示 “部分自动”）易混辨析

：注意与 similar（类似）、semi- 的变体前缀的（如 hemi- 也表 “半”，但更常见于医学或科学术语，如 hemisphere 半球）区分发音提示：semi- 在单词中通常发 /ˈsemi/ 或 /ˈsɛmi/ 音，具体来说是取决于后续音节的发音（例如在 semicolony 中发 /ˌsemɪˈkɒləni/ 音）。