耳朵

ear(noun)

the part of the head by means of which we hear, or its external part only

Her new hair-style covers her ears.

穗

ear(noun)

the part of a cereal plant which contains the seed

ears of corn.

聽覺，聽力(尤指可分辨聲音差異的能力)

ear(noun)

the sense or power of hearing especially the ability to hear the difference between sounds

sharp ears; He has a good ear for music.