Only with the rise of the Space Shuttle programme, beginning in 1981, and the dissolution of the Soviet Union a decade later, did America retake the crown.
只有在1981年开始的空间航天飞机项目，以及十年之后的苏联解体，才让美国取得了空间技术领域的桂冠。
Only with the rise of the Space Shuttle programme in the early 1980s, and the dissolution of the Soviet Union a few years later, did America retake the crown.
直到20世纪80年代初航天飞机计划的兴起以及没几年后苏联的解体，美国才重获该领域的主导地位。
The compactionand secondary enlargement of quartz lead to the great decrease of primary porosity of clastic rocks, and dissolution is contributed to the formation of secondary pore space.
压实作用和石英的次生加大使碎屑岩的原生孔隙度极大的降低，溶解作用是次生孔隙形成的主要因素。
In addition, dissolution of grain dolostone also occurs and shows the characteristics of hypergene dissolution in some places, which may contribute to the development of reservoir space.
另外，局部可见颗粒白云岩发生溶蚀，有些地方具有表生溶蚀作用的特点，对白云岩储集空间的发育有一定贡献。
The destructive diagenesis that keeps or enlarges pore space is dissolution, clay membrane of chlorite. It is insufficient for dissolution to improve the pore space.
建设性成岩作用为溶蚀作用、绿泥石粘土膜形成作用，但溶蚀作用产生的次生孔隙对储层物性的改善不足。
Reservoir space is divided into 3 types, that is original intergranular pore, secondary dissolution pore and micro-pore. The influence of different diagenesis on reservoir is analysed.
应用显微薄片鉴定、铸体薄片和扫描电镜等分析化验资料，将其储集空间分为3种类型：原生粒间孔、次生溶蚀孔、微孔隙，并分析了各种成岩作用对储层性能的影响。
The pore space was affected by the dissolution of calcite and feldspar, as well as the precipitation and cementation of carbonates.
溶蚀作用导致碳酸盐胶结物、长石颗粒和少量岩屑溶解流失。
The pore space was affected by the dissolution of calcite and feldspar, as well as the precipitation and cementation of carbonates.
溶蚀作用导致碳酸盐胶结物、长石颗粒和少量岩屑溶解流失。
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