例句與造句

1. We must not forget to open the aperture at the second contact .
   在食既時不要忘記放大光圈。
2. Second contact with master
   第二次接觸
3. Second contact surface
   第二界面
4. Even with the much closer venus , the observations were tricky ; it was crucial to know the exact geographic positions of the observing stations and to accurately time the four “ contacts ” between venus and the sun . ( the first and second contacts occur at ingress , when venus ' s disk touches the sun ' s from first the outside and then the inside ; the third and fourth contacts occur at egress . ) but the potential payoff from the observations would be enormous
   即使是距離近得多的金星，這個測量也不容易；必須要知道觀測站確實(shí)的地理位置，且要能準(zhǔn)確測定凌日時金星和太陽發(fā)生四次接觸的時間（第一和第二次接觸發(fā)生在初切，即金星的盤面由外然后再內(nèi)接觸到太陽盤面；第三和第四次接觸發(fā)生于終切） 。
5. It's difficult to find second contact in a sentence. 用second contact造句挺難的