1 sentence

1. 青蛙因其大眼睛而著称，但是很少有人清楚它们的眼睛为什么会向外突出。

   qīng​wā yīn qí dà yǎn​jing ér zhù​chēng, dàn​shì hěn shǎo yǒu rén qīng chu tā​men de yǎn​jing wèi​shén​me huì xiàng​wài tū​chū.

   Frogs are well-known for their big eyes, but few people know why their eyes bulge out.

   Source: CCMatrix