“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	straddle type monorail car bogie straddle type monorail turnout straddling fish stocks stragetic emerging industry stragetic industry straggler birds straggling straggling of particles Strahan Strahler-Zhou Shuzhen's climatic classification straight straight angle straight bevel gear straight chain reaction straight circular cone straight drawing straightedge straight edge diffraction straightenable dynamical system straightener straightening straightening law straightening of the angle straightening theorem straightest path

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