Those things might be social, sporting, creative or completelyrandom (dancing around the living room, anyone?).
这些事情可能是社交的、运动的、创造性的或者完全随机的(像是在客厅里跳舞,有人会吗?)。
2
In such studies, researchers would need to follow groups of children with and without music lessons over a long period of time—even if the assignments are not completelyrandom.