间作被定义作两种和两种以上的作物在生长季节被相互靠近的种植在同一块土地上，促进他们之间的互作。
Intercropping is defined as the growth of two or more crops in proximity in the same field during a growing season to promote interaction between them.
阿尔伯特.爱因斯坦在其广义相对论中对此已有预测，他指出密度极高，质量极大的物体相互靠近到一定程度时就会出现上述现象。
They were predicted by Albert Einstein as part of his theory of general relativity and expected to be generated whenever extremely dense and massive objects get too close to each other.
在设计可单击的导航时要特别注意这一点—不要把链接放得相互太靠近，因为用户不太可能单击了一个链接而不触及相邻的链接。
Keep this in mind when designing clickable navigation - don't put links too close together because the user will not be able to hit one link without hitting its neighbor.
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