operate(名词)operation
grate(形容词)grsateful
ill(名词) illness
medicine(形容词)medical
volunteer(形容词)volunteer
diffcult(同义词)hard
grow(名词)growth
begin(过去分词)beginning
operate(名词)operation
grate(形容词)grsateful
ill(名词) illness
medicine(形容词)medical
volunteer(形容词)volunteer
diffcult(同义词)hard
grow(名词)growth
begin(过去分词)beginning