Unrest in oil producing countries has been partly to blame.Last weekend, a rabel group in Nigeria said it attacked an oil center in B state.是什么意思_Unrest in oil producing countries has been partly to blame.Last weekend, a rabel group in Nigeria said it attacked an oil center in B state.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句