The main spring of the alarm clock is broken.

闹钟的簧断了。

《新英汉大辞典》

Part of Spring Modules, JCR module's main objective is to simplify development with the JSR-170 API in a similar manner to that of the ORM package from the main Spring distribution. Features include.

Spring Modules的一部分，JCR模块的主要目标是：以一种类似Spring主分发包中OR M包的方式，简化使用JSR - 170 API进行开发。

youdao

That was the main reason why Spring Festival acquired such great importance among Chinese people.

那也是为什么春节对于中国人如此重要的主要原因。

youdao

He manufactures every component of his watches himself, except for the main spring and sapphire crystal.

FORBES: Magazine Article

Preparation work for the new route from the A3095 is expected to start on 18 February with the main road works beginning in the spring for 26 weeks.

BBC: Broadmoor Hospital to get new access road ahead of revamp

Furthermore, GM will soon be introducing the redesigned models of its best selling Silverados in Spring and is the main reason why we expect the pickup sales to remain strong for the rest of the year as well.

FORBES: GM Earnings Should Keep Cruising On Strong U.S. And China Sales