pioneer /pa??'n??/ n. 先锋；先驱；带头人

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例句/词组:

a computer pioneer 计算机方面的先驱

英语解释：

a person who is the first to study and develop a particular area of knowledge, culture, etc. that other people then continue to develop 先锋；先驱；带头人

注：一词有多义，单词一次只记一种意思即可。