utilization hours造句

例句与造句

1. A total of 1, 084.7 astronaut-utilization hours were tallied by the Skylab 3 crew performing scientific experiments in the areas of medical activities, solar observations, Earth resources, and other experiments.
2. A total of 6, 051 astronaut-utilization hours were tallied by Skylab 4 astronauts performing scientific experiments in the areas of medical activities, solar observations, Earth resources, observation of the Comet Kohoutek and other experiments.
3. It's difficult to find utilization hours in a sentence. 用utilization hours造句挺难的