The single quotes are used because the double quotes are needed within the drawing command if more than one word is to be drawn, and you cannot have double quotes within double quotes.

使用单引号是因为如果需要绘制多个字，则绘图命令中需要使用双引号，而您不能在双引号中再用双引号。

youdao

The Frenchman is badly needed now that Didier Drogba and others have left for the Africa Cup of Nations but he is far more than an alternative to the Ivorian.

在德罗巴和其他人赶回国家队参加非洲国家杯时，球队迫切需要法国人的复出，但刚从伤病中恢复的他能否很好的替代德罗巴还不得而知。

youdao

Because every customer is unique (trust me, I have seen more than 200 environments), the portal installer had an almost infinite number of variables that we needed to juggle.

因为所有的客户都是唯一的(请相信我，我已经见过200多种环境)，门户安装程序几乎有无限多个变量需要我们修改。

youdao

But distribution is so poor that many still go hungry and government stocks of grain have reached 40m tonnes far more than is needed and very expensive to maintain.

ECONOMIST: India's economic reforms

"There is less money - and because there is less money it's more important than ever that the resources we have are targeted where they're needed most, " he said.

BBC: Whitehall push to recover ?20bn in unpaid debt