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。

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Yet Rubin's observations found no drop-off at all in the stars' velocities further out in a galaxy.

然而鲁宾的观测结果则表明，远离星系中心的全部星体的速率都没有降低。

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The observations are by no means conclusive, and Lisse concedes that instead of a storm of smallish comets, he could be seeing the debris from a single big one.

这一观测结果还不足下定结论，Lisse承认除了由小彗星组成的“风暴”，他也观测到一个大体积星体的残迹。

youdao

There have been no reports or observations of externalized conductors in these newer Optim-insulated leads, out of over 65, 000 of these leads sold worldwide since 2008.

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This has generated legitimate concerns that UAVs could be used by the government in ways that infringe privacy rights, particularly in light of three 1980s-era Supreme Court decisions that found no Fourth Amendment violation in warrantless observations from manned government aircraft.

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Court's own observations are that there's no question he understands what's happening today.

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