jacking system

例句：

1. 1. The engineer designed a new jacking system to improve the efficiency of the machinery.
   工程师设计了一种新的起动系统，以提高机械的效率。
2. 2.The jacking system was responsible for lifting heavy objects from the ground.
   起动系统负责从地面举起重物。
3. 3.The jacking system was crucial for ensuring the safety of the workers during construction.
   起动系统对于确保施工工人的安全至关重要。