experimental stuff的意思|示意

There are also lots of libraries for doing new experimental stuff like websockets and the community is very active.

还有很多库在尝试一些新的事情，比如websockets，社区也非常活跃。

I was not so sure about using a foldable bike making such a long journey with big load of gear stuff. It is kind of experimental.

出门之前实在没什么把握用小轮折叠车做这种负重的长途旅行。