nautical twilight
常見例句
- The observer begins the telescope startup process around nautical twilight, preparing the telescope then adjusting the pointing and focus.
觀測(cè)者大概在民用晨昏蒙影時(shí)開始啟動(dòng)望遠(yuǎn)鏡， 然后將望遠(yuǎn)鏡指向目標(biāo)并調(diào)好焦距。 返回 nautical twilight