test-launch preplan

例句：

1. 1.The test-launch preplan is crucial for the success of the space mission.
   测试发射预计划对太空任务的成功至关重要。
2. 2.The company has been working on a test-launch preplan for months.
   该公司已经为几个月的测试发射预计划工作了。
3. 3.The preplan for the test-launch was well thought out and executed flawlessly.
   测试发射的预计划经过深思熟虑且执行得无懈可击。