This activity lasts for about three hours, and at the end moment engineers present gifts to the students. All the students express their satisfactions on the activity.

• 本次活动约持续了三个小时，参与的同学普遍反映对活动非常满意，活动结束后，工程师们还给同学们赠送了小礼物。整个活动过程中，讲解深入浅出，同学们踊跃提问，场面十分热烈。