萤火虫用英语是:firefly。firefly 英[ˈfaɪəflaɪ] 美[ˈfaɪərflaɪ] n. 萤火虫; [例句]A firefly is a type of beetle.萤火虫是一种甲虫。In joy and sorrow, I will be my own firefly. 在喜悦和哀痛,我将是我自己的萤火虫。 A sympathetic firefly would have been enough for me. 如果有一只萤火虫同情地陪伴我,我就知足了。 This is actually the first time I have seen a firefly, so to me it felt amazing. 这实际上是我第一次看到萤火虫,所以觉得非常特别。 If you have ever seen a firefly then you have witnessed the same process in action.如果你曾见过萤火虫,那么你其实就已经目睹了同样的运作原理。