单词：vallation
vallation的用法和样例：
例句
- The green vallation was the main obstacle for the export of baisens because of the production manner of baisens and harmful organisms in baisens.由于我国盆景生产的方式以及有害生物的问题，绿色壁垒成为我国盆景出口的瓶颈。
- After china open its procurement market, more attention should be taken on those uncompetitive manners because they are legal trade vallation.待政府采购市场对外开放之后，再给予那些限制竞争的采购方式以更多的关注，发挥它们的合法贸易壁垒的作用。
单词：vallation 相关文章
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