An automatic machine or device is one that has controls that enable it to perform a task without needing to be constantly operated by a person. Automatic methods and processes involve the use of such machines.
近义词
automated , mechanical
反义词
manual
双语例句
例：
Modern trains have automatic doors.
现代火车都有自动门。
2.?（武器）自动的
An automatic weapon is one that keeps firing shots until you stop pulling the trigger.
双语例句
例：
Three gunmen with automatic rifles opened fire.
3名手持自动步枪的歹徒开了火。
3.?（行动）无意识的
An automatic action is one that you do without thinking about it.
双语例句
例：
All of the automatic body functions, even breathing, are affected.
所有无意识的身体机能，甚至呼吸，都受到影响。
NOUN. 名词
automatics
1.?[C 可数名词] 自动档汽车
An automatic is a car in which the gears change automatically as the car's speed increases or decreases.
2.?[C 可数名词] 自动式武器
An automatic is a weapon that keeps firing until you stop pulling the trigger.
双语例句
例：
He drew his automatic and began running in the direction of the sounds.