来到单位换算功能，Unitto 支持换算的单位涵盖了长度、质量、速度、面积、体积等，同时还支持货币换算，对于每一个类别下的不同单位，Unitto 还贴心地添加了收藏功能，方便我们在下次使用时随时调出。
// Stateless transform — a pure function
，更多细节参见体育直播
In most cases, just plain old method invocations will do. If two Business-Modules are on the same level (like e.g. “H&V Controller” and “H&V Simulator” from the example in point 4), invoking a public class’ method is just fine. It doesn’t even have to be an interface, although in some cases that’s handy.。WPS官方版本下载对此有专业解读
It is also necessary to emphasize that many optimizations are only possible in parts of the spec that are unobservable to user code. The alternative, like Bun "Direct Streams", is to intentionally diverge from the spec-defined observable behaviors. This means optimizations often feel "incomplete". They work in some scenarios but not in others, in some runtimes but not others, etc. Every such case adds to the overall unsustainable complexity of the Web streams approach which is why most runtime implementers rarely put significant effort into further improvements to their streams implementations once the conformance tests are passing.