1.refer to 涉及；指的是

All employees will refer to each other by the honorific suffix "san".
所有雇员相互称呼时都须在名字后添加敬语san（日语表示“先生”，“女士”）。

By way of illustration I'll refer to the behavior of rabbits.
我将举例说明兔子的行为。

2.relate to 涉及；同…有…关系

Other recommendations relate to the details of how such data is stored.
其他建议涉及此类信息储存方面的一些细节。

Afternoon groups relate to the specific addictions and problems therein.
下午的小组谈到具体的上瘾病例以及其中的问题。

3.even though 即使，纵然

I still love you even though I'd like to wring your neck.
虽然我想掐死你，但我还是爱你的。

Even though I'm quite a reserved person, I like meeting people.
我虽然性格极为内敛，但喜欢和人接触。