You can tag pictures of baby animals as happy, or whatever baby animals are to you, and then you can search that database, navigating with your feelings, rather than the keywords that just hint at them.
你还可以给动物的幼仔贴上“快乐”标签， 或者你觉得它们是什么样的就贴上什么标签。 然后你就可以搜索这个数据库， 根据你的感受来进行查询， 而不只是那些暗示词语。