Tā yòng qiāngtuo qiāole yī xià mén.
He knocked on the door with the butt of the gun.
Shìbīng yòng qiāngtuo dǐng zhù jiānbǎng miáozhǔn.
The soldier steadied the gun stock against his shoulder to aim.
Zhè zhī bùqiāng de qiāngtuo shì mùzhì de.
The stock of this rifle is made of wood.
