获取或设置一个值，该值指示项组是否已导入项目中。
Gets or sets a value indicating whether the item group was imported into the project.
一组受试者首先做了一项无聊的任务，而另一组则直接去做创造性的任务。
One group of subjects did a boring activity first, while the others went straight to the creative task.
在一项研究中，研究人员给三组六岁的儿童安排了一项困难的任务，让他们在电脑上完成。
In a study, researchers gave three groups of six-year-old children a difficult task to complete on a computer.
应用推荐