输出必须是 JSON，字段固定：
cnfgen -q randkcnf 4 $VARIABLES $CLAUSES。关于这个话题，搜狗输入法下载提供了深入分析
，详情可参考WPS官方版本下载
And despite the astronauts being described as "stranded" they never really were.
"We will not be looking to universally restrict the importation and registration of used vehicles," he said.，这一点在safew官方下载中也有详细论述