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base on使建立在…基础上,立足
例句：We must base ourselves on the interests of the people.
我们一定要从人民的利益出发。
2.He pointed out a line of mountains that appears from east to west in South Africa.
point out指出; 把注意力引向…
例句：This guide book points out the main facts of early American history.
这本导游手册讲述了美洲早期的重要史实。
If I make any mistakes, please point them out.
如果我出了错, 请指出来。
3.He said the oceans were more than just low places that had filled with water.
fill with(使)充〔挤〕满
例句：The sky filled with stars.
满天星斗。
