议程的倒数第三项the antepenultimate item on the agenda宇宙飞船已开始倒数计时了.The spaceship is already being counted down.正割函数的倒数，称为余割函数。The value of the complement of the secant is called the cosecant....
镇子上充盈着一种节日的喜庆气氛。The town has a festive holiday atmosphere.当时是圣诞节,每个人都沉浸在节日的欢乐中.It was Christmas and everyone was in festive mood.全镇沉浸在节日的气氛之中。The whole town is in a festal mood....