machine rifle

例句：

1. 1. The machine is very efficient in its operation.
   这台机器在操作上非常高效。
2. 2. He was able to fix the machine by himself.
   他能够自己修理这台机器。
3. 3. This machine can be used for both manual and automatic tasks.
   这台机器既可以手动操作也可以自动操作。