单词：pulse echo fault locator
单词：pulse echo fault locator 相关文章
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2014年VOA慢速英语(四)月
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VOA标准英语2014年(四月)
Words and Expressions connection n．连接；联系；关系 echo n．回首；回声；反响 awfully ad．异常，非常 doubt n．怀疑，疑问，疑惑 fault n．缺点，毛病 engineer vt．设
英文语法词汇
Dialogue A (A：Operator B：Lin Ping) A：Operator．How can I help you？ B：Yes．The connection was bad．There was a lot of echo and Icouldn't hear well，will you put me through again？ A：I'
英文语法词汇