基本解释[地球科學]背負泵英汉例句雙語例句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.我們的定制壓嘴，可以很方便的裝在你的尿佈包，運動包，或背包中。而不會造成溢出。backpack pump更多例句词组短语短語backpack concentrator backpack suction pump 背負式採氣泵knapsack backpack pump 背負泵backpack pump更多词组专业释义地球科學背負泵