To better understand this, let's return to the world database and consider two of its tables, Country and City, which are linked to each other via the code foreign key.

为了更好地理解这一点，我们回到world数据库并考虑它的两个表Country和City，此二者通过code外键相互链接在一起。

youdao

Many of the worst abuses are committed by the foreign investors' local partners: will they be restrained by some international code?

最严重的不当行为中有许多都是外国投资者在所在国的生意伙伴所为：这些人会受到某种国际准则的约束吗？

youdao

The code also has special provisions for foreign drivers, many thousands of whom have just spent their holidays touring the country.

对于大多数来意大利度假的国外驾驶员，新条令有特别的规定。

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And last week the government moved to overrule the Supreme Court and change the tax code to tax foreign takeovers retroactively, not least Vodafone's purchase of its Indian arm.

ECONOMIST: India��s economy

Burma awaits an updated foreign investment code with stronger rights, protections and tax incentives.

BBC: Investors eye resourceful Burma

There may be no more vexing challenge in the Revenue Code than the taxation of foreign transactions of multinational companies.

FORBES: A New Way To Address The International Tax Mess For U.S. Companies