英 ['r?tɑ?d] 美 ['r?tɑrd]
vt. 延遲；阻止；妨礙；使減速
vi. 減慢；受到阻滯
n. 延遲；阻止
英文翻譯及例句：
1.
V-T If something retards a process, or the development of something, it makes it happen more slowly. 阻礙; 減緩
例：
Continuing violence will retard negotiations over the country's future.
持續不斷的暴力活動會阻礙關於國家未來的談判的進行。
2.
N-COUNT If you describe someone as a retard, you mean that they have not developed normally, either mentally or socially. 笨蛋; 傻子