The extra credit assignment is optional for students.

额外的加分作业对学生来说是可选的。

I didn't get the extra credit. FML

很显然，我没有获得这次的附加分。

Here is my attempt at extra credit.

这里是我的尝试额外学分。

Extra credit found its way into stock and property prices.

额外信誉由此有机可乘，进入股份和房地产市场。

We get extra credit for the slightest act of thoughtfulness.

一点点体贴的行为就能增加我们的信誉。

Extra credit: See if you can do this without reading glasses.

友情提示: 看看下你能不能不用放大镜就完成这事儿.

Extra extra credit: If you use a Captcha system for registration, see how many times it takes to get the word right.

友友情提示：如果你的网站注册时需要可恶的验证码 ，看看你折腾了多少次才弄清楚那验证码是个啥单词。

There's a negative to everything- find it. Extra credit for constant complaining.

每件事物都有不好的一面——找出来，而且经常抱怨。

Students use our courses to gain extra credit points for their undergraduate degrees.

学生通过学习我们的课程可以在本科阶段获取额外学分。

Troy: Dude, you know that school musical thing? You get extra credit just for auditioning?

伙计，你知道学校音乐剧的事儿吧？报名就有加分。