本课主要单词
1. unwilling adj.不情愿的，不愿意的;勉强的
she is unwilling to share anything with others. (她不愿意与他人分享任何东西。)
2. equator n.赤道
3. bulge n.不规则突起;鼓起之处;(突然)上涨，增多 v.使膨胀;塞满
Between the bulge of South America and the bulge of Africa lies the narrowest place of the Atlantic Ocean. (大西洋的最狭窄处位于南美洲的突起处和非洲的突起处之间。)
4. unusual adj. 少有的;不寻常的;与众不同的，独特的
It was not unusual for him to work very late every night. (每天工作到深夜对他来说是很平常的事。
5. salty adj. 咸的，含盐的 salt n. 盐;风趣 v. 用盐调味;用盐腌;撒盐于道路上
He didn’t have much for dinner as the dishes were too salty. (他晚餐吃的不多，因为菜太咸了。)
grind salt in sb.’s wounds 在某人伤口上撒盐，使某人痛上加痛
with a grain of salt 半信半疑地
Salt Lake City 盐湖城(美国尤他州州府)
请注意：形容词salty是由名词 salt加形容词后缀 -y构成的。这样的形容词在英语中还有很多，如：windy，snowy，rainy，cloudy，sunny，funny，muddy，foggy…
6. average n. 平均数，平均 adj. 平均的;平常的，普通的 v. 平均
He is an average student in his class.(他是班上的一般学生。)
7. spot n.地点，处所;点，斑点 v. 点缀;认出;准确定位 adj. 当场作出的;现付的
She toured many scenic spots during the holiday.(假日里她游览了许多风景胜地。)
She is so special， you can spot her in the crowd easily. (她很特别，你在人群中能一眼认出她来。)
8. range n. 山脉;幅度，范围 v.(在某范围内)变动，变化;把…排列成行
medium-range missile 中程导弹 wide range of interests 兴趣广泛
at close range 接近地 in/within range 在射程内
9. peak n. 山峰;顶点
His career is at its peak . (他的事业正处于鼎盛时期)
10. vessel n. 船，舰;容器，器皿
an ocean-going vessel 远洋轮
11. crew n. 全体船员，全体机务人员
The crew was (were) annoyed at the captain’s decision.(船员们对船长的决定感到恼火。)
12. becalm v.(常用被动语态)(指帆船)因无风而停止前进
He was becalmed for a whole week north of the island. (他在海岛北面因无风而停泊了整整一周。)
13. gulf n. 海湾;隔阂;鸿沟
The quarrel left a gulf between the two close friends. (那场争吵在两位好友间造成了隔阂。)
14. stream n. 小河，溪流 v. 流，涌
Tears streamed down her cheeks when she heard the news.(当她听到那个消息时，泪水顺着脸颊流了下来。)
15. current n. (空气，水等的)流，潮流;电流;倾向 adj. 当前的，通行的
Mass media influence the current of public opinion.(大众传媒影响舆论的倾向。)
current events 时事 current situation 当前形势
16. affect v. 影响;打动;(疾病)侵袭 effect n. 效果;作用，影响;
no effects 无存款(银行在空头支票上的批语)
be of no effect无效 bring sth. to effect 实行，实施
in effect实际上 take effect 见效;生效
17. climate n. 气候 weather n. 天气
18. flow n. 流 v. 流动
The doctor stopped the flow of blood. (医生把血止住了。)
19. furnish v. 供应，提供;装备，(用家具)布置
20. highway n. 公路; (水陆)交通干线
21. float v.(使)漂浮
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