在英语大作文的第二段中，可以使用以下连接手段：

1. 表示转折的连接词：however, nevertheless, nonetheless, on the other hand等。

例如：However, some people argue that technology has made our lives easier and more convenient.

2. 表示因果关系的连接词：because, since, as a result, therefore, thus等。

例如：As a result, many people have become more aware of the importance of environmental protection.

3. 表示递进关系的连接词：furthermore, in addition, moreover, not only...but also等。

例如：Furthermore, the government should take more measures to reduce pollution and promote sustainable development.

4. 表示比较和对比的连接词：similarly, likewise, on the contrary, in contrast等。

例如：On the contrary, some people believe that technology has brought more harm than good to our society.

5. 表示总结和归纳的连接词：in conclusion, to sum up, in summary, therefore等。

例如：To sum up, we need to strike a balance between the benefits and the drawbacks of technology.