英语：词汇及解析：height

　　17. height n. 1 at a height of 30,000 meters 2 It’s about 2 meters high/ in height.

　　18. help n. / v. 1 help sb. (to) do/with sth. 2 help sb out of 帮助..摆脱…

　　3 can’t help doing 禁不住做… 4 can not help but do不得不做某事

　　5 help oneself to sth. 随便用… 6 with one’s help

　　19.◎helpful adj. be very ~ = be of great help

　　20.◎hesitate vt. ~ to do sth hesitation n. without hesitation

　　21.high 1) adj. at a high / low price in a high voice in high spirits

　　2) adv. 与 highly的区别 1high表示具体的含义 “高高地 ” fly high in the sky/ jump high

　　2highly表示的是抽象的含义 “高度地” a highly developed country think / speak highly of