求翻译：已有研究未涉及与土地利用景观梯度变化密切相关的各种驱动力对土地生态环境在时间和空间上加和与协同作用的累积影响和定量化表达是什么意思？

The existing research does not involve the landscape gradient and land use are closely related to various driving forces on land ecological environment on the time and space and the cumulative effects of synergy and quantitative expression

Studies have not been involved with land-use landscape gradient is closely linked to the various forces driving land ecology and environment in time and in space, and with the cumulative effects of synergy and quantitative express

Had the research not to involve with land utilization landscape gradient change close correlation each driving influence adds to the land ecological environment in the time and the space with with the synergism accumulation influence and the quantitative expression

Research has not addressed various closely related to changes in land use and landscape gradients driving force on Canada Lands on the eco-environment in time and space and with the cumulative effect of synergy and quantitative expression

There thinking and perspective in existing single, research results in homogeneity and other defects and