| 词组 | expert |
| 释义 | 1． 后面常跟介词 in，on，at 等: He is an expert in radio communi- cations. He is an expert on Japan. He is an expert at teaching chil- dren. 2． 下面两个句子都对: He is expert on trade in China. ( expert 作形容词) He is an expert on trade in China. ( expert 作名词) |
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