求翻译：非关税壁垒是指以进口数量限制为特点的贸易保护主义措施，它们被发达国家和有些发展中国家用来干扰和阻碍商品和劳务在国际间的自由流动。是什么意思？

Is the number of non-tariff barriers to restrict imports characterized trade protectionist measures, which are developed and some developing countries to interfere and hinder goods and services in the international freedom of movement.

Non-tariff barriers to imports is characterized by quantitative restrictions on trade protectionist measures, and that they have been developed and some developing countries have used to interfere with goods and services and hinder the freedom of movement in the international community.

The non-tariff barrier is refers take imports quantity limit as the characteristic trade protectionism measure, they use for by the developed country and some developing nations to disturb and the hindrance commodity and the service in the international free flowing.

Characteristics of non-tariff barriers limit refers to the volume of imports to protectionist measures, they have been developed and some developing countries to interfere with and hinder the free movement of goods and services in the international arena.

The non-tariff trade barrier refers to the trade protectionism measure regarding importing the restriction in quantity as characteristic, they are come and interfere with and hinder the goods and freedom internationally of labor service from flowing by developed country and some developing countries