上盖，其末端与此U型支架相轴接， 用来让使用者施力于此上盖上再将力传递至此冲子；
The end of the upper cover is connected with the U-shaped bracket by a shaft, which is used for applying the force on the upper cover by users and then transferring the force to the punch.
正如人们所了解的，端粒酶因其能够保护端粒，从而阻止DNA链的分离，就像鞋带末端的塑料能防止其受到磨损。
Telomerase is known to protect telomeres which stop the string of DNA unravelling much like the plastic tips at the ends of shoelaces stop fraying.
有的蚂蚁抵达饲喂点后，就将其腿部末端切除，以缩短其步长。
Some ants, when they arrived at the feeding station, had the ends of their legs amputated, to shorten their stride length.
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