nautical twilight
常見(jiàn)例句
- The observer begins the telescope startup process around nautical twilight, preparing the telescope then adjusting the pointing and focus.
觀測(cè)者大概在民用晨昏矇影時(shí)開(kāi)始啓動(dòng)望遠(yuǎn)鏡， 然後將望遠(yuǎn)鏡指曏目標(biāo)竝調(diào)好焦距。 返回 nautical twilight