Mainspring

(noun.) the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism.

琼整理

• HEEP, and only HEEP, is the mainspring of that machine. 查尔斯·狄更斯. 大卫·科波菲尔.
• As the hammers move back the mainspring is compressed, and when the dog B is removed from the notch by pulling on the trigger, the hammers are released and the gun fired. Edward W. Byrn. 十九世纪发明进展.
• In it is coiled the mainspring--a strip of steel about twenty-three inches long, which is carefully tempered to insure elasticity and pull. 佚名. 神奇的知识之书.
• The mistake is not in attaching importance to preparation for future need, but in making it the mainspring of present effort. 约翰·杜威. 民主与教育.
• The outer end of the mainspring is attached to the rim of the barrel, and the inner end to the barrel arbor. 佚名. 神奇的知识之书.
• And so the alternate actions proceed, and the balance wheel travels further each time, until it reaches the greatest amount which the force of the mainspring can give. 佚名. 神奇的知识之书.
• If we wind up the mainspring of the watch it will immediately cause the main wheel to turn, and, of course, that will turn the next wheel, and so on to the escape wheel. 佚名. 神奇的知识之书.

录入:玛莎