notocord

基本解释

• n.脊索

同根派生

英汉例句

• That is, the growth cones collapsed. 2. In the 4th embryonicday (E4), sema 3A mRNA was expressed around the neural tube and atthe notocord.
  在鸡胚发育的第 4天（E4），Sema 3A InRN表阴神经管周围和脊索。