Intrusion into natural areas by port expansion and maintenance can pose serious threats to wildlife and sensitivespecies and habitats.
闯入自然生态区域进行港口扩建和维护，均会对野生动物和敏感类生物以及植物生态环境造成严重的威胁。
2
It basically means that even developed landscapes can contribute to the overall ability of a region to support sensitivespecies that lived there before development occurred.
In all 17 species, the commonest kind of light receptors were "rod" cells, which are highly sensitive to light and allow night vision but cannot tell colors apart, they found.