Question

What do you mean by-"Zipped and trilled and bounced along"? and "That your song must be your own." Please answer!

Answer 1

"Zipped and trilled and bounced along" means that the Nightingale's song lost its charm due to the rigorous training by the frog.It became mechanical.She practiced day and night in all sorts of weather and eventually lost her melody,thereby losing her audience.