n.主体部分，主要影响，(钟表等的)主发条

原形：mainspring复数：mainsprings

The watch's mechanism is powered by a mainspring, which ensures its accurate timekeeping.
手表的机械装置由发条驱动，保证了它的精确计时。
The old grandfather clock had a strong mainspring that kept it ticking for decades.
那座古老的老爷钟有一个坚固的发条，让它运转了几十年。
She wound the mainspring of her watch before leaving for the party.
她在去派对前给手表的发条上紧。
A well-oiled mainspring ensures a smooth operation of any mechanical device.
良好的润滑发条确保了机械设备的顺畅运行。
The engineer replaced the worn-out mainspring with a new one to restore the antique pocket watch's functionality.
工程师用新的发条替换掉了磨损的，以恢复古董怀表的功能。
The winding key is used to maintain the tension in the mainspring of a wind-up watch.
上链钥匙用于保持自动上链手表发条的张力。
The watchmaker carefully examined the mainspring to ensure it wasn't damaged.
钟表匠仔细检查发条，确保没有损坏。
The vintage clock's intricate mainspring system fascinated the amateur horologist.
那个复古时钟的复杂发条系统让业余钟表爱好者着迷。
The watchmaker adjusted the tension in the mainspring after a complete cleaning of the watch.
钟表匠在彻底清洁手表后调整了发条的张力。
A watch that needs to be wound daily is one with a mainspring that runs out quickly.
每天需要上弦的手表，说明它的发条耗电量大。