由于这类壁垒大量的以技术面目出现，因此常常会披上合法外衣，成为当前国际贸易中最为隐蔽、最难对付的非关税壁垒。
A large number of technical barriers appear as a veneer of legality, so has become the most covert international trade and the most difficult entreated non-tariff barriers.
由于这类壁垒大量的以技术面目出现，因此常常会披上合法外衣，成为当前国际贸易中最为隐蔽、最难对付的非关税壁垒。
A large number of technical barriers appear as a veneer of legality, so has become the most covert international trade and the most difficult entreated non-tariff barriers.
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