1. learn that 听说；发现；了解到
We learned that she was studying English and Japanese by herself at home, and was pretty good at writing.
我们发现她在家自学英文和日文，作文写作水准还挺高！

2. be the heart of 是……的核心/心脏
A vital, ongoing intellectual conversation --about our writing and that of published authors--is the heart of the course.
本课程的核心是对我们和作家的文章进行重要、持续的知识讨论7,5;Zy6uFmfev。

3. criminal history 犯罪前科
Fiddler has a long criminal history with arrests for assault, driving without a licence and not having her two older children in car seats.
凶手有多次前科，还因人身侵犯罪、无证驾驶罪以及没有尽到看护人的权利将小孩放到了车座下而被逮捕过ltg8A4KKYT58VsZ。

4. for one's part 从……的角度来看；
For their part, food companies have been trying to address weaknesses in their supply chains.
从食品公司来看，它们一直在努力应对供应链中的薄弱环节w^)-.13prsGLH9jIg%*。