长柄草耙和餐叉的主意就是来自叉状的树枝；飞机来自滑翔的鸟类。

The idea for the pitchfork and table fork came from forked sticks; the airplane from gliding birds.

youdao

长柄草耙和餐叉的主意就是来自叉状的树枝；飞机来自滑翔的鸟类。

The idea for the pitchfork and table fork came from forked sticks; the airplane from gliding birds.

youdao