vallation的用法和樣例：
例句
用作名詞 (n.)
- The green vallation was the main obstacle for the export of baisens because of the production manner of baisens and harmful organisms in baisens.
由於我國盆景生產的方式以及有害生物的問題，綠色壁壘成為我國盆景出口的瓶頸。 - After china open its procurement market, more attention should be taken on those uncompetitive manners because they are legal trade vallation.
待政府採購市場對外開放之後，再給予那些限制競爭的採購方式以更多的關注，發揮它們的合法貿易壁壘的作用。
