将切下的瓣叶缝合于正常三尖瓣环上；

The leaflets were sewn to the normal valve annulus;

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从未成熟的花粉粒或者切下的完整的花药中再生出单倍体植株的过程。

Anther culture (pollen culture) the generation of haploid plants from immature pollen grains or intact excised anthers.

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如果患病的动物被加工，通过切下的肺或者淋巴组织，牛结核分枝杆菌(Mycobacterium bovis)可以传播到牛肉的其他部分。

If an infected animal is processed, cutting through lung or lymph tissue can spread the M. bovis bacteria to other parts of the meat.

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