The endocardium is smooth, beneath which can be seen a red - brown myocardium.光滑的心内膜下面是红棕色的心肌.In 2 patients scar was intramural or epicardial with extension to the endocardium.2位患者的瘢痕从心室壁或者心外膜延伸到心内膜....
Catherine the Great was a patron of the arts and sciences.叶卡捷琳娜大帝资助发展艺术和科学。Mathematics was once dubbed the handmaiden of the sciences.数学曾一度被视为各门科学的基础。It's beyond my depth when it comes to natural sciences.谈到自然科学我就茫然...