育龄夫妇

couples of child-bearing age

• knife
• knight
• knit
• knob
• knock
• knot
• know
• knowledge
• konigsberg
• koran
• korea
• korean
• kosciuszko
• lab
• label
• laboratory
• laborious
• labour
• labourer
• lace
• lack
• lad
• ladder
• lady
• lag