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

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

Known as a ski-resort city, the tourist destination has attracted celebrities and affluent socialites for decades helping to transform the Aspen real estate market into a mix of high-end luxury homes and condos.

FORBES: Standoff: 5 Figure Rental vs. 5 Figure Mortgage

What this means is that the iPhone mix tilted towards the low-end, probably because many high-end smartphone buyers deferred their iPhone purchases until the launch of the iPhone 5, while lower-end purchases remained steady.

FORBES: Move up http://i.forbesimg.com t Move down