墨尔本斯威本科技大学(Swinburne University of Technology)天文学家Alan Duffy,当月球运行至太阳和月球之间时,就会发生月食的现象.月全食时,从地球两侧射过来的太阳光被地球大气折射进地球的影子里.折射后形成各种颜色的单色光,而红光穿透大气层能力最强,所以只有红光容易...
1、Paying by Cash 现金支付Guest: Waiter, the bill, please.服务员,结账.Waiter: Yes, sir.好的,先生.Waiter: Here is your check/bill, sir. Thank you.先生,这是您的账单,多谢.Guest: Here you are.给你.Waiter: 200 yuan. Please wait a minute. I'll be right back with your changes and receipt.这...