1. The difficult question is how to find that profitable niche and protect it. 这个难题是：如何找到有利可图的利基市场并加以保护。
2. An ancestral species might have adapted to exploit a particular ecological niche on one island and then traveled over water to colonize other islands. 一个原始物种可能已经适应了利用一个岛屿上特定的生态位，然后在水上迁徙到其他岛屿定居。
3. 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。
4. I think we have found a niche in the toy market. 我认为我们已经在玩具市场找到了领地。
5. He eventually found his niche in sports journalism. 最后他在体育新闻界找到了理想的工作。
