an apple a day keeps doctors away.这句话的主语是什么?

an apple a day keeps doctors away.这句话的主语是什么? an apple a day keeps doctors away 出自哪 An apple a day keeps (the doctor)/(doctors) away? 英语翻译An apple a day keeps the doctors away.翻译 翻译：An apple a day keeps the doctors away. an apple a day,keeps doctors away的说法是不是正确的? An apple a day keeps doctors away 是哪个国家的谚语 A apple a day keeps a doctors away什么意思 An apple a day,keep the doctors away的汉语是什么? an apple a day keeps a doctor away,是什么意思 An apple a day keeps a doctor away是什么意思? 英语翻译:eat an apple a day keeps the doctor away.