diaphragm knapsack sprayer

例句：

1. 1. The diaphragm is the main muscle that supports the lungs.
   膈肌是支撑肺部的主要肌肉。
2. 2.Diaphragm surgery is a common procedure used to treat heart failure.
   膈肌手术是一种常用的治疗心脏病的方法。
3. 3.During deep breathing, the diaphragm contracts and expands to increase lung capacity.
   深呼吸时，膈肌收缩和扩张以增加肺容量。
4. 1. He packed his bags and left for the trip.
   他打包行李准备出发去旅行。
5. 2. The hiker carried a rucksack filled with food and water.
   这位徒步旅行者背着一个装满食物和水的背包。
6. 3. She bought a hiking backpack for her upcoming camping trip.
   她为即将到来的露营旅行买了一个登山背包。
7. 1.The gardener uses a sprayer to water the plants.
   园丁使用喷雾器给植物浇水。
8. 2. The pest control company uses a mist sprayer to kill insects.
   害虫控制公司使用喷雾器来杀死昆虫。
9. 3.The painter uses a sprayer to apply paint on canvas.
   画家使用喷雾器在画布上涂漆。