Ⅳ.重点句型 1. Neither is there pine nor apple in pineapple.在菠萝里既没有松树也没有苹果。 2.That is why when the stars are out, they are visible, butwhen the lights are out, they are invisible. 这就是为何当星星出来时,它们是可以看得见的,但是当灯关了的时候，它们是不可以看见的。