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他是钻井工程师。钻井设备。
He is a drilling engineer.
youdao
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一个好的钻井工程师必须懂得几门外语。
It is necessary that a good drilling engineer should know foreign languages.
youdao
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一个好的钻井工程师必须懂得几门外语。
It is necessary that a good drilling engineer should know foreign languages.
youdao