Since Mongo is schemaless, there is no need to specify schema, only collections must be created. Same for indexes - these are just classic (B-tree) indexes that work on any field type.
Rising oil and gas prices may hit increase of £300 a year for typical working-age households, says leading thinktank
，更多细节参见heLLoword翻译官方下载
这段参数听起来或许有些晦涩，我们把它翻译成大白话：
有记者问：美国和以色列2月28日对伊朗发动军事打击以来，海合会国家和约旦等国境内的美军目标先后遭到袭击，相关国家发表声明予以谴责。中方对此有何评论？
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