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- knapsack = backpack pump 背负泵
- A tyre expands when you pump air into it. 轮胎一打气就鼓起来。
- The moment he received the order, the soldier packed his knapsack. 士兵一接到命令就打了背包。
- Lashing velocity of pump is concerned with nature of air. 泵的抽气速率与气体的性质有关。
- This tire is flat; you didn't pump enough air in. 这个轮胎没气了;你并没打足气。
- We have a pump for drawing water from the well. 我们用一个水泵从井里抽水。
- The heart is analogous to a pump. 心脏和水泵有相似之处。
- Will my sweater go in your knapsack? 你的背包里还放得下我的球衣吗?
- Can you lend me your bicycle pump? 能把你的打气筒借给我吗？
- Let me take my camera out of my backpack. 让我把相机从我的背包里拿出来。
- My backpack is thin, but theirs are heavy. 我的背包是轻的，但他们的是重的。
- A large green backpack with an aluminum frame. 一个大的有铝架的绿色背袋。
- Here is an old-fashioned pump for drawing water from a well. 这里有一个旧式水泵可从井里抽水。
- It's time to wear my backpack and go to school. 开始背起书包上学堂了.
- To hike while carrying a backpack. 背着包徒步旅行
- Do you think she got everything into her knapsack? 你认为她把所有一切都放进了她的背包里吗?
- Heaved his backpack into the corner. 他把背包往角落里一扔
- Knapsack problem is a typical NP complete problem. 背包问题是一个典型的np完全问题。
- You will need to pump hard for several minutes to fill the tank. 你需用泵著实抽吸几分钟，才能把油箱灌满。
- He was complete now with that knapsack on. 背上了那个背囊，如今他就样样俱全了。
