The（）steels are highly resistant to corrosion（rusting）in a variety of environments, especially the ambient atmosphere.

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• Since p and b are phonetically similar, occur in the same environments and they can distinguish meaning, they are said to be（）.
• The different phones which can represent a phoneme in different phonetic environments are called the（）of that phoneme.
• Operating rooms are（）environments.
• This course aims to develop students’ proficiency in the use of English knowledge and skills in a wide range of business environ