this example that extracts the element type of an array:
+ "types": ["node", "jest"]。PDF资料对此有专业解读
МИД Азербайджана отреагировал на атаки иранских дронов14:03。关于这个话题，电影提供了深入分析
“War is hell and always will be,” he said. “Our grateful nation honors the four Americans we have lost thus far and those injured – the absolute best of America.”，推荐阅读体育直播获取更多信息
db.createCollection("accounts");