... 消蚀塑料 ablative plastic 难点消蚀法 Eliminating Difficulty 坡面消蚀构造 wall structure ...
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eliminating difficulty
消除困难
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In parts of Asia, where the current poultry outbreaks began in mid-2003, experience has demonstrated the difficulty of eliminating the virus once it has become widely present in birds.
在亚洲部分地方，当前的禽类疫情暴发始于2003年中期。经验表明，一旦病毒在禽鸟中广泛存在，就很难消灭。
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