closed loop的音標是["klu?st?? l???k]，基本翻譯是“閉環”或“封閉回路”。速記技巧可以考慮將loop這個單詞拆分記憶，其中l可以與來、類等易混的字母組合聯想，o可以與單詞other（其他）中的o聯想，這樣有助于快速記憶。同時，也可以將這個單詞與類似單詞進行對比記憶，如closed和open進行對比，有助于更好地記憶和理解。

Closed loop 的英文詞源是拉丁語，意為封閉的環路。其變化形式主要有復數形式closed loops，過去式形式closed the loop，現在分詞形式closing loops。

相關單詞：feedback，反饋；loop，環；closed-circuit，閉路；feedback loop，反饋回路；control loop，控制回路；feedback control，反饋控制；control system loop，控制系統回路；closed-loop control，閉環控制；loop-hole，漏洞；loop-line，回路線路。

Feedback是其中最相關的單詞，意為向某物提供信息或數據以影響其行為或結果。例如在控制系統中，反饋可以用于調整系統參數以實現最佳性能。此外，Loop也可以指代一個封閉的路徑或環狀結構，如在電路中。其他單詞也與系統、控制和反饋有關，體現了closed loop在各種應用中的重要性和廣泛性。

以上內容僅供參考，建議到英語字典、詞典網站查詢更多關于closed loop的單詞和變化形式。

常用短語：

1. closed loop control

2. closed-loop feedback

3. closed-loop system

4. feedback control loop

5. feedback loop

6. feedback mechanism

7. feedback loop control

雙語例句：

1. The closed-loop feedback control system ensures precise control of the process parameters.

2. The closed-loop feedback mechanism ensures that the system is always in balance.

3. The closed-loop system allows for precise adjustment of the output based on feedback from the environment.

4. The feedback control loop ensures that the system remains stable and reliable.

5. The feedback loop ensures that any errors are quickly corrected, thereby improving the overall performance of the system.

6. The closed-loop feedback mechanism ensures that the system remains responsive to changes in the environment.

英文小作文：

Closed-loop Systems are becoming increasingly popular in modern technology, as they allow precise control of a process or system based on feedback from the environment. These systems are particularly useful in areas such as automation, robotics, and artificial intelligence, where they can quickly adapt to changes in the environment and ensure reliable and efficient operation.

Closed-loop systems are also beneficial in healthcare settings, where they can monitor and adjust patient conditions based on feedback from sensors and monitors. For example, closed-loop insulin delivery systems can automatically adjust the amount of insulin delivered to a patient based on their blood sugar levels, ensuring that they remain healthy and stable.

Overall, closed-loop systems provide precise, reliable, and efficient control over a process or system, making them an essential tool in modern technology and healthcare settings.