他说，这些按键按上去感觉很硬，人能明显感觉到按键的回弹。
It feels very firm when I press one of the keys and I can very clearly feel the keys snap back after pressing them, ' he says.
乔治。A .柏南诺，以回弹性(百分之八十五的能适应失落的人的反应)的研究著名的哥伦比亚大学的临床心理学教授，一开始表示怀疑。
George A. Bonanno, a professor of clinical psychology at Columbia known for his work on resilience (the reaction of the 85 percent of the population that does adapt to loss), was skeptical at first.
然后提出型面修改的SGD算法并采用该算法能得到曲面光顺，可以直接用于NC加工的回弹补偿型面。
Secondly, panel surface after springback compensation can be achieved by SGD algorithm the surface is smooth and can be used to NC machining.
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