后一种配额常与外汇管制相结合，以防出现国际收支赤字。
In the latter case, the quotas are usually combined with a system of exchange control in an attempt to prevent a balance of payments deficit.
环保署也实施进口配额制度，管制潜在消耗臭氧层可能较低的其他物质。
The EPD is also implementing a quota system to control the import of other substances with less ozone-depleting potential.
当前国际贸易中最大的困难十非关税壁垒，如进口配额限制、出口管制。
The major difficulties in international trade today are the non-tariff measures, such as quotas export controls.
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