[ěr duo]

have sharp ears
耳朵尖

credulous; easily influenced; susceptible to flattery
耳朵軟

shout in sb.'s ear
對著某人耳朵叫喊

pinch sb.'s ear
擰耳朵

pick one's ear
挖耳朵

I pull him by the ear.
我揪他的耳朵。