细胞凋亡是一种重要的生物学过程，在细胞生长发育以及对外界刺激的反应中有关键的作用。
Cell apoptosis is an important biological process. It plays an essential role on cell growth and response for outside stimulations.
观察他或她对外界刺激的反应，然后你也需要一同样的情绪作回应——震惊，厌恶，幽默，同情等。
Watch his or her reactions to outside stimuli, then show the same emotions - shock, disgust, humour, compassion, etc.
在这个基础测试中，大脑两个半球的内侧皮层(对外界刺激作出反应)都表现得很活跃。
During this baseline test, both hemispheres of the brain's medial frontal cortex (which is involved in motivation) appeared active.
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