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。

youdao

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。

youdao

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。

youdao