1. 加热器;加热装置;暖气设备;炉子
A heater is a piece of equipment or a machine which is used to raise the temperature of something, especially of the air inside a room or a car.

1. (baseball) a pitch thrown with maximum velocity

e.g. he swung late on the fastball
he showed batters nothing but smoke

Synonym: fastballsmokehummerbullet

2. device that heats water or supplies warmth to a room

Synonym: warmer