First, why would the existence of God guarantee the meaningfulness of each of our lives?

第一点，为何上帝的存在即保证了每个人的人生之意义？

Meaningfulness: This relates to the sense of identification the audience has with the topic.

意义：这涉及到观众认同与主题的。

Second, and more pointedly, must the meaningfulness of our lives depend on the existence of God?

第二点，同时也是更尖锐的一点，人生的意义必须有赖于上帝的存在么？

This paper reporys the connotation and meaningfulness of rebuilding the teaching and research culture.

对教研文化重建的意义和教研文化本身进行了论述。

He memorizes his songs and then expresses the music accurately for his own point of view through his own meaningfulness.

他记下他的歌，然后带着自己独特的意义，从自己的观点出发，准确地唱出音乐。