“primitive cardiovascular system”的概念、定义、翻译、参考文献-科学参考

单词	primitive cardiovascular system
释义	primitive cardiovascular system Encyclopedia 医学心血管系统的发生释 primitive cardiovascular system原始心血管系统人胚第3～5周，胚体内逐渐形成心管、动脉和静脉，构成卵黄循环、脐循环和胚体循环组成的系统。
随便看	switch grinder car switchgroup switching switching circuit switching class switching diode switching field switching hub switching map switching model switching mode power supply switching network switching noise switching overvoltage switching overvoltage of electric power system switching power supply switching rule switching station switching technique switching theory switching time switch lattice switch mechanism switch region switch-signal generator

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