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.
由于我國盆景生產(chǎn)的方式以及有害生物的問(wèn)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.
待政府采購市場(chǎng)對外開(kāi)放之后，再給予那些限制競爭的采購方式以更多的關(guān)注，發(fā)揮它們的合法貿易壁壘的作用。
