Environmental changes due to factors such as climate change are likely to be difficult to identify against the background noise arising from the numerous sources, both natural and man-made, of environmental variability.
Environmental changes due to factors such as climate change are likely to be difficult to identify against the background noise arising from the numerous sources, both natural and man-made, of environmental variability.
在众多自然及人为因素产生的环境变异源导致的噪音背景下，因气候变化等因素造成的环境变化很难确定。