1. Block copolymers have rich phase behavior,and in the bulk they can microphase-separate to form spheral,cylindrical,bi-continuous or layered structure.
   嵌段共聚物有着丰富的相行为,在本体中会发生微相分离形成球形、柱形、双连续形和层状结构。
2. The acrosome in the head was spheral in shape, and there was only one mitochondria in the mature sperm.
   核染色质凝集成团块状，中部不发达，线粒体融合成1个环绕中部。

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