资料来源 : Webster's Revised Unabridged Dictionary (1913)

Daughter-in-law \Daugh"ter-in-law`\, n.; pl. {Daughters-in-law}.
   The wife of one's son.

资料来源 : WordNet®

daughters-in-law
     See {daughter-in-law}

daughter-in-law
     n : the wife of your son
     [also: {daughters-in-law} (pl)]