由于抗原转变和抗原漂移，禽流感病毒是高度可变的。
Avian influenza virus are highly labile, because of antigenic drift and antigenic shift.
由于单体上下对接，高度可变，可以利用烧蚀变短的电极棒。
As the single bodies are butted up and down, the height of the invention can be changed and an ablation and shortened electrode bar is used.
实性成分的强化也是高度可变的，从无强化到环状到均匀强化都可以出现。
Enhancement of the solid portion is highly variable, ranging from non-enhancing to ring-like to intense homogeneity.
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