基本解释[地球科学]背负泵英汉例句双语例句Our custom pump locks in the 'up' position making this lotion perfectly portable in a diaper bag, gym bag, or backpack without worrying about a mess.我们的定制压嘴，可以很方便的装在你的尿布包，运动包，或背包中。而不会造成溢出。backpack pump更多例句词组短语短语backpack concentrator backpack suction pump 背负式采气泵knapsack backpack pump 背负泵backpack pump更多词组专业释义地球科学背负泵