Earth is where we all live.
That's where we differ.
not just any 不是一般的,不只是
depend on sb 依赖
natural resources 自然资源
water resources 水资源
human resources 人力资源
provide sth for sb
provide sb with sth
take care of 照顾
thousand 千
million 百万
billion 十亿
diameter 直径
radius 半径
be covered by sth 被...覆盖
the rest of 其余的,剩余的
a layer of 一层
a layer of dust 一层灰
a mixture of sth ...的混合物
a mixture of emotions 百感交集
altitude 海拔
attitude 态度
at the edge of sth ...的边缘
Pacific Ocean 太平洋
Atlantic Ocean 大西洋
Indian Ocean 印度洋
Arctic Ocean 北冰洋
creek 小溪
fresh water 淡水
a hundred percent 百分之百
flow 流动
flow from high ground to low ground
the flow of funds from the US to Europe
eg：There has been a steady flow of people leaving the area.
volume
water volume 水流,流量
the volume of water flowing through it per second
falling 落下的
produce electricty 发电
supply sb with sth
supply sth to sb
eg：Cows supply us with milk.
eg：Cows supply milk to us.
agriculture 农业
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