如何翻译成英文“自1975年起，每四年举行一届。凡智力70以下的人都可以参加”。

问题描述：

问题解答：

Since 1975, It is the Special Olympica that held every four years and that anyone whose intellectual is under 70 can participate in.

Since 1975, held every four years term. Where intellectual person under 70 can participate.
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Ever since 1975, it is hold every four years. Anyone with IQ (Intelligent Quantity) below 70 is eligible to attend.