insider
n
person who, as a member of a group or an organization, is able to obtain information not available to others 内部的人; 知情人. insider `dealing (also in,sider `trading) buying or selling with the help of information known only by those connected with the business 内幕交易.
The Native Americans caught and trained them and were then able to use them to carry their goods when they travelled from one camping ground to another.
美洲土著人捕捉野马,加以驯服。
There is a journalist and writer living in America whose name is Alex Haley.
有一位住在美国的记者兼作家,名叫亚历克斯·哈利。
I always carry matches with me at such times and I tore out the pages of the first chapter of the book I was reading to get the fire going.