Damper

(noun.) a depressing restraint; 'rain put a damper on our picnic plans'.

(noun.) a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations.

(noun.) a movable iron plate that regulates the draft in a stove or chimney or furnace.

戴维录入

• If the damper is kept open, coal is rapidly consumed, and the additional heat passes out through the chimney, and is lost to use. 伯莎M.克拉克. 科学通论.
• When the fire is started, the damper should be opened wide in order to allow the escape of smoke; but after the fire is well started there is less smoke, and the damper may be partly closed. 伯莎M.克拉克. 科学通论.
• They were, perhaps, overtaken by the growth of the European forests, as the climate became milder and damper. 赫伯特·乔治·威尔斯. 世界史纲.
• The nitrogen in the bottle, not only does not assist the burning of the match, but it acts as a damper to the burning. 伯莎M.克拉克. 科学通论.
• Erard particularly made many improvements in that and in the nineteenth century in the piano, its hammers and keys, and Southwell of Dublin in the dampers. 威廉·亨利·杜利特. 世纪发明.

整理:米切尔