No primary part of the tester was machined again, and a few new parts were fitted on the tester. These made it easy to recover primary states and assure the primaryaccuracy of the tester.
The primary goals of professional communication are accuracy, clarity, and completeness.
专业表达的主要目标是准确、清楚和完整。
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The primary purpose of the mission is to collect observations that can be used to check the accuracy of simultaneous observations collected by NASA's Aura satellite.