编辑推荐： 本研究聚焦软骨鱼类代表小点猫鲨 (S. canicula)的躯干肌早期分化过程，通过光镜与透射电镜 (TEM)技术解析其体节 (somite)的"玫瑰花结"样结构特征及肌原细胞分化动态。研究发现其体节分化模式与肺鱼、蝾螈等更接近，提示为脊椎动物肌发生的祖征；而肌生成 (myogenesis)起始于体节腹侧的特征 ...

The canicula was on the lips of waitresses, Rosary Society ladies and even priests, some of whom mentioned it last week during their homilies.

Imagine trying to explain a family portrait of more than 12 people. Some stand in erect, like statues frozen in time. Others, children, seem to have movement in the graying photograph, arms ...