transportable rocket fuel purification system

例句：

1. 1.The new car is very transportable and easy to drive.
   这款新车非常可运输，驾驶起来也很方便。
2. 2. The backpack is very transportable and can hold a lot of books.
   这个背包非常可运输，可以装很多书。
3. 3. The portable charger is perfect for on-the-go powering up devices.
   便携式充电器非常适合在移动中为设备充电。