Muscle stem cells - which multiply to form other muscle cells - are taken from an animal such as a cow or pig in a relatively simple procedure which avoids the need to kill or seriously harm it.

肌肉干细胞——可通过培育形成其它肌肉细胞——是通过一个相对简单的手术从诸如奶牛或猪之类的动物上身提取出来的，而不必去杀死或严重伤害这些动物。

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Removing a cervical polyp is a relatively simple procedure that can be performed in the office.

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Dr Blott also stressed that the use of forceps, or other devices to aid birth was a relatively simple procedure, which many women would prefer to enduring pain over long periods.

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