Inner quality and substance are more important than outward appearance. It can also imply that a capable wife who manages the household well is a great asset to her husband.
选房子不能光看外表，得看结构和材料，毕竟表壮不如里壮。
When choosing a house, you can't just look at the exterior; you have to consider the structure and materials, because inner quality is more important than outward appearance.
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