Faced to tillage land resource reducing and large proportion of hilly fields, increasing yield per unit area must be done to meet the need of increasing population at present and in the future.

辽宁省耕地资源少、坡耕地比重大，满足现在和将来日益增长的人口需要，必须在保护好现有耕地面积基础上，提高单产。

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In the 1970's, when few protected area existed in any ocean, human population was significantly smaller and the demands on natural resources far less than at present — or in the future.

70年代，建立海洋保护区还是鲜为人知的事儿。当时，人口数量也比现在少得多，对自然资源的需求比现在或者将来要小得多。

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