弧形缺口 meaning in Chinese

scallop

There are two types of yolk granule inside of ovum , in which vesicle or arc gap could be observed by om , and the yolk granule has been decomposed by 4 pathway : ( l ) . be decomposed straight in cytoplasm ; ( 2 ) . begin to be decomposed from the vesicle inside of yolk ; ( 3 ) . begin to be decomposed from the arc gap of yolk ; ( 4 ) . before decomposed , the yolk will be enwrapped by envelope
内部形成小泡，卵黄从内部小泡开始碎裂、降解。外部形成弧形缺口，卵黄从弧形缺口开始碎裂、降解。卵黄外被囊泡，卵黄颗粒在小泡内进行降解，残存的颗粒将随囊泡以胞吐的形式排于卵周隙。