Here, the first string is defined with a pair of single quotes. The second one USES a pair of double quotes.

这里，第一个字符串使用一对单引号定义，第二个字符串使用一对双引号定义。

youdao

Single quotes are better, because then you can use double quotes inside the one-liner.

单引号更好，因为使用单引号后您可以在一行程序内使用双引号。

youdao

The careful reader will realize that this may fail badly if the passed argument includes single quotes.

细心的读者会发现，如果传递的参数包含单引号，将会完全失败。

youdao

ConnecTV delivers a rich content experience that syncs instantly with the show you're watching and delivers complementary play-by-play stats, news, information and quotes that can be shared with friends and followers-all with a single touch.

ENGADGET: ConnecTV officially launches, gives you more ways to bug your buddies