On the basis of these experiments and of field observations, the so-called law of competitive exclusion was formulated, according to which no two species can occupy the same niche.
在这些实验和实地观测的基础上，人们制定了所谓的竞争排斥定律，根据该定律，没有两个物种可以占据相同的生态龛。
Behind the main hall and with a lowered ceiling, the back seating area is a rectangular box-shaped space all covered in oak, from ceiling to floor, like a timber niche inserted inside the main hall.
位于主厅后面的座位区是一个长方盒子形状的低矮空间，从吊顶、墙面、到地面，都用橡木木板铺满，仿佛是嵌入在主厅里的木龛。
The standard view is that the niche shapes stem cells, not vice versa.
以往传统的观点认为是这个干细胞龛形成了干细胞，反之则不成立。
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