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短语

maintain

[meɪn'teɪn] 动词
专利 fenntart
to maintain [meɪn'teɪn] 动词
运输 tartani
 英语 词库
"Maintain..." 动词
航空, 加拿大 Concerning altitude or flight level FL, an expression meaning "Remain at level specified"; Concerning other ATC instructions, the term is used in its literal sense; e.g., "Maintain VFR".
maintain
: 11 短语, 4 学科
专利3
化学2
程序法5
财政1