gravitational
a. of or having to do with gravitation 重力的；地心引力的

grip
n. tight grasp; firm hold 掌握；控制

planet
n. 行星

utterly
ad. completely; totally; absolutely 完全地；彻底地；绝对地

maintenance
n. the act of maintaining or the state of being maintained 维持；保持；维修，保养

human
n. a person; man 人；人类

worship
vt. show great admiration for and respect to 崇拜；尊敬

historic
a. of or having to do with history; famous or important in history 历史的；历史上著名的

prehistoric
a. 史前的

era
n. a historic period 时代

appropriate
a. right for the occasion; suitable 适当的；合适的

visible
a. capable of being seen; apparent 看得见的；明显的

worshipper
n. 崇拜者

unlikely
a. not likely; not probable 不大可能的

extreme
a. in or to the greatest degree; very great 极端的；极度的
n. an extreme degree 极端

billion
n. 十亿

easily
ad. 容易地

sunset
n. the going down of the sun; the time when the sun goes down 日落；日落时分

dawn
n. the beginning of day; the first morning light in the east 黎明；拂晓

reappear
vi. come into sight again 再出现

warm
v. （使…）变暖

hell
n. 地狱；阴间

absolute
a. complete; perfect; not allowing any doubt 绝对的；完全的；确定无疑的

gas
n. 气体；煤气；汽油

atmosphere
n. the air that surrounds the earth 大气；空气

nitrogen
n. 氮气

oxygen
n. 氧气

onto
prep.to a position or point on (sth.) 在…之上

powder
n. 粉，粉末

liquid
n. 液体

* refute
vt. prove (a person) to be in error; show (a claim, opinion, or argument) to be false or incorrect 驳斥；反驳

sage
n. a very wise and widely respected person 圣人；哲人

daytime
n. 白天；日间

Phrases and Expressions

of course
naturally; certainly 自然，当然

rain down (on)
fall in showers or like rain 如雨一般降下；倾泻

off the mark
missing the desired object or end; off the subject 不准确；不相关，不切题

keep on (doing sth.)
continue; go on 继续（做某事）

in the extreme
extremely 非常，极度

good for
able to last or be used for 能持续…，能保持…有效

go down
disappear below a surface or from sight; become low in price, value, etc. （日、月等）落下；（价格、价值等）下降

warm up
make or become warm or warmer （使）暖和起来

turn into
（使）成为

and so on
and other things of that kind 等等

Proper Names

Hugh Downs
休·唐斯

Pacific, the
太平洋

Fahrenheit
华氏温度计（的）