1）Essential a nineteenth-century instrumen,,the caliope wasusually played outdoors and was a part of fairs, holiday gatherings, and other such acticities.
essential应怎么改？
作者: robert 时间: 2004-10-8 18:32
essentially， 改成副词， 换个方式看就是： the caliope is essentially a nineteenth-century instrumen.
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