The Crow and the Sheep_英语寓言故事

a troublesome crow seated herself on the back of a sheep.
the
sheep, much against his will, carried her backward and forward
for a long time, and at last said, "if you had treated a dog in
this way, you would have had your deserts from his sharp teeth."
to this the crow replied, "i despise the weak and yield to the
strong.
i know whom i may bully and whom i must flatter; and i
thus prolong my life to a good old age."