Animal welfare rule is vallum instituted by developed country, which is adapt to stockbreeder marketing.
动物福利准则

年来许多发达国家新设定的贸易壁垒。
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Many barriers to commerce between the US, Canada and Mexico were removed or reduced by the North American Free Trade Agreement, which came into force a quarter of a century ago. But President Trump called it the worst trade deal ever.
北美自由贸易
消除或降低了很多美
、加拿大和墨西哥之间的贸易壁垒,该
议在25年之前正式生效,但是特朗普称这是有史以来最差的贸易
议。