vt. 弄慢，延缓，延迟，使停滞，推迟；使耽误，妨碍，阻止；【物、工】减速。 Lack of science and education retards social progress. 缺乏科学和教育会妨碍社会进步。 vi. (潮水涨退等)迟延；耽误；迟到。 n. 迟延，迟滞，耽误；妨碍，阻止。 in retard 迟延，耽搁，阻碍。 keep at retard 使迟延，耽误，阻碍，妨碍发达[进步]。
a person of subnormal intelligence 同义词：idiot, imbecile, cretin, moron, changeling, half-wit,
cause to move more slowly or operate at a slower rate; "This drug will retard your heart rate"
lose velocity; move more slowly; "The car decelerated" 同义词：decelerate, slow, slow down, slow up,
slow the growth or development of; "The brain damage will retard the child''s language development" 同义词：check, delay,
be delayed
例句与用法
1.
Larvas become retarded in the mucus . 幼虫被阻留在粘膜内。
2.
Small molecules are retarded from leaving the column . 小的分子被阻滞在层折柱上。
3.
A retarded child needs help , not pity . 智力迟钝的孩子需要的不是怜悯，而是帮助。
4.
A serologic reaction retards the growth of the pollen tube . 血清反应阻止花粉管生长。
5.
Lack of science and education retards social progress . 缺乏科学和教育会妨碍社会进步。
6.
The heart rate is regularly accelerated and then retarded . 心率有规律的加速而后减慢。
7.
Numerous and extensive cavities retard the turbulent mixing process . 多而大的涡流区延迟了扰动的混合过程。
8.
Numerous and extensive eddy cavities retard the turbulent mixing process . 多而大的涡流区延迟了扰动的混合过程。
9.
Writing may retard the process of language change under certain conditions . 在某些情况下，文字可能延缓语言的变化。
10.
China started special education for the mentally retarded children in 1979 . 中国于1979年开始对弱智儿童实施特种教育。
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