ratardation

常见例句

• The developmental ratardation of brain in rats induced by prentalexposure to HTO had observed by measuring the contents of cerebral amino acids.
  以腦組織中遊離氨基酸含量爲指標,觀察出生前因氚水照射引起的大鼠腦發育障礙。
• Mental ratardation children
  精神發育遲滯兒童
• material ratardation
  實質性阻礙
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