n. a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
常见例句
1
n the backward escape of gases and unburned gunpowder after a gun is fired n a loud noise made by the explosion of fuel in the manifold or exhaust of an internal combustion engine n a fire that is set intentionally in order to slow an approaching forest fire or grassfire by clearing a burned area in its path n a miscalculation that recoils on its maker v come back to the originator of an action with an undesired effect v emit a loud noise as a result of undergoing a backfire v set a controlled fire to halt an advancing forest to prairie fire
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the backward escape of gases and unburned gunpowder after a gun is fired n
3
An apparatus for testing or proving the strength of gunpowder.
4
A puff, as of smoke from a pipe, or of dust from a puffball; a slight explosion, as of a small quantity of gunpowder. n
