1 sentence

1. 蚕的一生要经过几次变态才能变成蛾子。

   cán de yī​shēng yào jīng​guò jǐ cì biàn​tài cái néng biàn​chéng é​zi.

   A silkworm undergoes several metamorphoses before turning into a moth.

   Source: Dong Chinese Dictionary