First, you can mix single and double quotation marks when creating a string, as long as the string USES the same type of quotation mark at the beginning and end.

第一，在创建字符串时，您可以混合使用单引号和双引号，只要字符串在开始位置和结束位置使用同一类型的引号。

youdao

When you use metaphor, do not mix it up. That is, don't start by calling something a swordfish and end by calling it an hourglass.

你用隐喻时，前后不能混为一谈。也就是说，不要在开始的时候把一个东西称之为旗鱼，而后面又称之为沙漏。

youdao

While traditional media will remain an important advertising vehicle for high-end fashion companies, social media needs to be part of the marketing mix too.

尽管传统媒体仍然是高端时尚公司的重要广告工具，大众媒体也需要成为营销组合的一部分。

youdao

This is the end result we get when we mix free trade capitalism, with advancing technologies.

FORBES: What To Do About The Rise Of The Robots?

The store's "ethos, " she said, is to carry a mix of high-end specialty items along with affordable products like Schaefer beer and, yes, Snickers.

WSJ: Comforting the Wealthy

It is, in this case, both the Chadians and the people from Darfur that have sought in Chad that end up being caught in the mix.

NPR: Chad Conflict Stirs Global Response