二恶英在环境和食品中以一种复杂的混合物形式出现。
Dioxins occur as a complex mixture in the environment and in food.
如何辨别并测量环境和食品中的二恶英？
What does it take to identify and measure dioxins in the environment and food?
注：请务必交验中、英、法文的学历证书和成绩单复印件。
Note: Copies of last degree and transcripts in Chinese, English or French must be submitted.
他买了两本关于中国的书和一本英中字典。
He bought two English books about China and one English-Chinese dictionary.
他买了两本关于中国的书和一本英中字典。
He bought two English books about China and one English-Chinese dictionary.
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