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1·Many factors can lead to growth retardation in unborn babies.

许多因素可以导致胎儿发育迟缓。《牛津词典》

2·Acute exposure to lead may impact mice behavior altering such as irritability, hyperkinesis, retardation of learning and memory, etc.

急性铅暴露可能影响小鼠的行为改变，如易怒、运动亢进、学习和记忆迟钝等。

3·A score below 70 May indicate mental retardation.

分数低于70可能表明你有智力缺陷。

4·In addition, 4 patients presented with growth retardation.

此外，4例患者表现出生长发育迟缓。

5·Brain damage, leading to mental retardation and occasionally seizures.

脑损伤，并导致智力迟钝和无规律的抓握动作。

6·Paints. Thick plastics coatings. Retardation of dripping water diffusion.

涂料。厚塑料涂层。滴水渗透的阻滞。

7·The IQ test alone does not determine whether someone is mental retardation.

仅靠智商测试一项并不能断定一个人是否智力迟钝。

8·One doctor diagnosed PKU, a metabolic disease that can result in retardation.

一个医生诊断为pku，是一种会导致迟钝的新陈代谢疾病。

9·Studies show that iodine deficiency is the leading preventable cause of mental retardation.

研究显示，缺碘是智力发育迟缓的一个主要但可预防的因素。

10·A color-versus-retardation chart is used to interpret the observed pattern (see Table I).

彩色银两迟缓图是用来解释观察到的模式(见表一)。

(1)mental retardation智力迟钝；智能缺陷（等于mental deficiency）

(1)growth retardation生长迟缓；生长阻滞