How are ethnicity and race alike?How are they different?300字也行

How are ethnicity and race alike?How are they different?
ethnicity
KK:[]
DJ:[]
n.
1.种族地位;种族特点;种族渊源
race
KK:[]
DJ:[]
n.
1.人种;种族;民族[C][U]
The British are a sea-going race.
英国人是个航海的民族.
2.(动植物的)属,种,类[C]
3.血统,宗族,门第[U]
He was a man of noble race.
他是个出身高贵的男士.