Low introductory credit card rates are limited to a fixed term, usually between 6 and 12 months, after which a higher rate is charged.
信用卡的低利息只适用于固定期限，通常为6 - 12个月，之后将会被征收高利。
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The rates charged to Athens would be about 5 per cent for a three-year fixed loan – above the IMF's standard lending rate but below those currently demanded by jittery investors.