树中有清风。一二三四视频免费观看中文版1

　　Feeling the rain and tasting the sweet nectar of fruit for the first time, a baby monkey experiences its surrounds from the comfort of its mother’s embrace – until it is pried away and subjected to experiments for scientific gain and research. 　　Taking a deeper look into Harry Harlow’s attachment theory from the perspective of his subjects, and drawing from decades of testing on ... (展开全部)