EOL:Website-api results can be cached/zh-hans

!!FUZZY!!任何API调用的响应可在指定的时间长度内缓存。会提供一个“cache_ttl”参数，其数值是响应缓存所需的秒数。This will create HTTP headers indicating the result should be cached by web browsers, and additionally the response will be cached on EOL's servers for the specified number of seconds. If the value of "cache_ttl" is changed, the first request with the new value will not hit the cache, but subsequent requests will leverage the newly cached response.