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.
您可以配置 Fan Out 中介原语，以仅触发其输出末端一次，或对使用指定 XPath 表达式获取的每个元素都触发一次。
You can configure the Fan Out mediation primitive to fire its output terminal just once or once for each element obtained using a specified XPath expression.
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