closed circuit的音標是[?kl??st ?s??k(?)l]，基本翻譯是閉路，也指閉路電視。速記技巧是將其分解為單詞的組成部分并使用符號代替某些字符。

Closed Circuit的英文詞源是close和circuit，意為“閉合電路”。它的變化形式主要有復數(shù)形式closed circuits，過去式closed the circuit，過去分詞closed the circuit等。

相關單詞：

loop：意為“環(huán)，回路”，其詞源同circuit同源，表示閉合的路徑。

self-circuit：意為“自回路”，即自我連接。

open circuit：意為“開路，斷路”，與closed circuit相反，表示電路沒有連接。

circuit breaker：意為“斷路器”，是一種能夠自動切斷電路的設備。

circuitous：意為“迂回的，曲折的”，其詞源表示曲折的路徑。

serial circuit：意為“串聯(lián)電路”，是由電阻、電容、電感等元件按照串連的方式連接而成的電路。

circuit board：意為“電路板”，是電子設備中用于承載電路的板子。

motor circuit：意為“馬達電路”，是用于控制馬達工作的電路。

power circuit：意為“電源電路”，是提供電源的電路。這些單詞都與電路和電子有關。

常用短語：

1. closed circuit television (CCTV)

2. closed circuit broadcast

3. closed circuit control

4. closed circuit recording

5. closed circuit operator

6. closed circuit advertising

7. closed circuit access

例句：

1. The security camera is monitoring the closed circuit to ensure safety.

2. The broadcast was transmitted to all closed circuit receivers.

3. The control panel allows the operator to operate the closed circuit system.

4. The recording device is used for closed circuit recording.

5. The operator must be certified to operate the closed circuit operator"s job.

6. The advertising company placed advertisements on closed circuit TV.

7. The access code allows access to the closed circuit system.

英文小作文：

Closed Circuit Television (CCTV) is a vital tool for protecting our homes and businesses. It provides a constant surveillance of the premises, ensuring that any potential threats are detected and dealt with promptly. CCTV cameras not only provide security, but also act as a deterrent to crime, reducing the likelihood of vandalism or theft.

Moreover, closed circuit systems can be used for various purposes, such as monitoring traffic conditions, recording events, or displaying advertisements to viewers. With the advancements in technology, CCTV systems have become more advanced and versatile, offering greater flexibility and functionality than ever before.

However, it is important to remember that while closed circuit television can provide security and convenience, it cannot replace human interaction and vigilance. It is still essential to have a well-trained team of security personnel on hand to respond to any emergencies or incidents that may arise.