市场中每种商品都已相应的数量单位来交换，我们交换“蒲式耳”的小麦；“包”的香烟(20根)；“一对”的鞋带；一台电视机……等等。
Every good on the market exchanges in terms of relevant quantitative units: we trade in "bushels" of wheat; "packs" of 20 cigarettes; "a pair" of shoelaces; one TV set; etc.
知道要使用文档哪个区域后，就可以为映射选择相应的根。
Once you know what areas of the document you are going to work with, you can choose an appropriate root for your map.
可以使用用户名db2inst1或根用户和相应的密码进行连接。
You can either use username db2inst1or root and the user's corresponding password for connecting. Once you are logged in, you can see the current status of db2 and its databases.
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