jettisonable rocket pack

例句：

1. 1. The jettisonable rocket pack was a revolutionary innovation in space travel.
   这种可抛弃的火箭背包是太空旅行的一次革命性创新。
2. 2.The disposable plastic bags are often used for shopping rather than thrown away.
   一次性塑料袋通常用于购物，而不是被扔掉。
3. 3. The detachable parts of the machine can be replaced without having to dismantle the entire device.
   机器的可拆卸部件可以在不拆解整个设备的情况下进行更换。