Since I have included this sentence here, this sentence is introducing the conclusion.

因为我在这里加入了这句话，这句话是在引入结尾。

Also, you'll notice at the end of this paragraph I included a summing up sentence.

此外，你会注意到在这段的结尾我加入了一个总结句。

So if I would have perhaps just included the first sentence and not the second, I would not have received full points.

所以如果我只说了第一句而没有说第二句，我久不会获得满分。

In another experiment, a pandemic-era message to parents first included a few sentences acknowledging the difficulties of home-schooling, then asked them to take a survey.

在另一项实验中，疫情期间给家长发送了一条短信，开头几句话对在家辅导孩子学习的不易之处表示理解，然后邀请家长参加一项问卷调查。