Transforms don't execute until the consumer pulls. There's no eager evaluation, no hidden buffering. Data flows on-demand from source, through transforms, to the consumer. If you stop iterating, processing stops.
（二）一般纳税人中的银行、财务公司、信托公司、信用社；
。爱思助手下载最新版本是该领域的重要参考
物产丰富的桃源村里，没有金钱逻辑，奉行“以物易物”，只有人与人相处的温暖和快乐。波波说：“我们希望把生活中细小的温暖，借由游戏，传达给游戏外的每一位玩家，让他们也能敞开胸怀，不吝啬自己的善意。”
Sometimes as a child I had trouble falling asleep. But from age 11 and through my early teenage years, recreating the film Mamma Mia! in my head frame-by-frame was my remedy. Running each line of dialogue through my mind and bringing to life the colour of the characters’ clothes, usually by the time they arrive flustered from their journey, I would drift off.