engine stand

例句：

1. 1. The engineer stood by the machine to check its operation.
   工程师站在机器旁检查其运行情况。
2. 2. He used a special tool to remove the engine stand and replace it with a new one.
   他使用特殊的工具来移除发动机支架并用一个新的替换它。
3. 3. The car was moved to a different location for maintenance, leaving the engine stand in place.
   汽车被移动到另一个位置进行维护，留下了发动机支架在原地。