Chiefly Astronautics. That is initially designated as the crew, vehicle, equipment, etc., in contrast to a backup or reserve; esp. in prime crew n.…
| 单词 | θ208024 |
| 释义 | society > travel > air or space travel > a means of conveyance through the air > spacecraft > parts of spacecraft > [adjective] > originally designated (of equipment) (1) prime1965 Chiefly Astronautics. That is initially designated as the crew, vehicle, equipment, etc., in contrast to a backup or reserve; esp. in prime crew n.… |
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