因此家长总会请家教来确保万无一失，即便已经送孩子读私立学校，家教几乎也是非要不可的。

So many parents, including those paying for private schools, see home tutoring as a near-compulsory insurance policy.

youdao

If you tried to do one alone it would not work, so we decided to divide it up imperfectly and there may be some repetition between our two courses.

非要分开单独来学的话是不可行的,所以我们只能退而求其次,分割后的两门课可能会有重复的部分

耶鲁公开课 - 金融市场课程节选

you know, it's just that I don't have to be a millionaire, although that wouldn't be bad.

你知道，我不是非要当百万富翁不可，虽然那样也不错。

阳光总在风雨后 - SpeakingMax英语口语达人