住房泡沫破灭已经凸显了税收底子有多薄。

Burst housing bubbles have revealed how thin the tax base is.

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税收协调可以避免国际重复征税和偷漏税问题，可以避免过度税收竞争，在当前形势下进行国际税收协调的必要性和重要性日益凸显。

Tax coordination can avoid double taxation, tax evasion and excessive tax competition, so the necessity and importance of the international tax coordination are increasing under the current situation.

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