曰南北，曰东西。此四方，应乎中。
East, west, south and north are the four directions correspoonding to centre.
蚂蚁们具有无数复杂的社会行为而且拥有微乎甚微的智慧。新的研究目前建议，授教应被列入在蚂蚁的成就表中。
Ants have a myriad of complex social behaviors despite possessing only teeny brains. Now new research suggests that teaching should be added to the list of ant accomplishments.
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