Firstly, as the annotations are in the aspects, not core business logic, the cost of switching isn't high.

首先，因为注解存在于切面中，而不是核心业务逻辑，所以转换的成本并不高。

youdao

I'm not opposed to a core curriculum in principle, but I think requiring a foreign language is unrealistic.

原则上我不反对必修课程，但是我认为把外语列为必修课是不现实的。

《柯林斯英汉双解大词典》

In the core curriculum, we do have a course that is not about Western culture.

在核心课程中，我们确实有一门课不是讲西方文化的。

youdao

He says many,if not all, of the top American colleges once had a core curriculum a set of courses required for all students.

VOA: special.2009.10.22

At the core of it is a belief in progress, something that was essentially not present among the Greeks.

其核心就是对于进步的信仰,实质上说这在希腊文化中是不存在的

耶鲁公开课 - 古希腊历史简介课程节选

The core electrons tend not to be involved in much chemistry in bonding or in reactions.

核电子倾向于不参与结合,或者反应。

麻省理工公开课 - 化学原理课程节选

They often come up with great inventions that are not core to the company.

FORBES: Connect

We have overhauled risk management and reduced risk exposures, while shedding assets and businesses that are not core to our strategy.

FORBES: Citi: $730M Settlement Ends Claims It Misled Investors Over Bonds, Stock

While there are synergies in building out a display business and a coupon business, these are not core strengths of Google.

FORBES: Google-Groupon: Price Too High?