我有以下几点不明白，请各位帮帮忙：
1. On the other hand, maybe people are just genuinely curious, as they would be if confronted with a dinsaur bone.
if在这里是什么用法？

2. I never get the feeling that they think I'm crazy for riding something so old when I could be fussing with gears and having a presumably easier time of things.
这句话该怎么翻译阿？

3. A time when people thought in terms of settling into a cushioned seat, stopping the movement with their heel and travelling a bit slower than we are travelling now.
这句话是什么意思啊？

4. I just don't get excited over the idea of yet another thing I could do if I pulled the right lever or set the right program.
这句话我怎么也理解不来噢！yet在这里是什么意思阿？

1. On the other hand, maybe people are just genuinely curious, as they would be if confronted with a dinsaur bone.
if在这里是什么用法？

另一方面, 也许人们只是纯粹的好奇, 就像他们见到一块恐龙骨头也会感到好奇那样.
if 这里就是一假设.

2. I never get the feeling that they think I'm crazy for riding something so old when I could be fussing with gears and having a presumably easier time of things.
这句话该怎么翻译阿？
我搞不懂为什么我骑部老车他们就觉得我疯了.  我倒觉得和齿轮打交道还不错的，开着也挺安逸的..

3. A time when people thought in terms of settling into a cushioned seat, stopping the movement with their heel and travelling a bit slower than we are travelling now.
这句话是什么意思啊？
主句是 一个时代,  后面是补充说明 一个人们联想到坐到车垫上, 脚下不用踏板子, 开得比现在慢的那个时代.

4. I just don't get excited over the idea of yet another thing I could do if I pulled the right lever or set the right program.
这句话我怎么也理解不来噢！yet在这里是什么意思阿？
感觉是强调吧. not sure....

2.3意译的. 不一定准确..

这么多你都每一个都回答了，太谢谢了！

I just don't get excited over the idea of yet another thing I could do if I pulled the right lever or set the right program.
pulled the right lever ：我个人还是不知道如何地道的翻译。
不过从整个句子看，可能是这个意思：
不过我没有因为有着我本来可以做另外一件事情的想法而感到兴奋，想法就是…………，或者我做了正确的程序