英语词汇sustainer怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	sustainer
释义	sus·tain·er /səˈsteɪnə(r)/ n. 1. 支撑者(或物)；支持者(或物)；保持者(或物)；持续者(或物)；维持者(或物) 2. (多级火箭或导弹的)主级；主发动机 3. ＝ sustaining program
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