21、脾气暴躁是人类较为卑劣的天性之一，人要是发脾气就等于在人类进步的阶梯上倒退了一步。

Temper is one of relatively low human nature， if one loses his temper is a step backwards on the ladder of human progress。

22、不要因为长期埋头科学，而失去对生活、对美、对待诗意的感受能力。

Don't cry because it is in science for a long time， lost to the life， to the United States， with poetic feelings of ability。

23、乐观是希望的明灯，它指引着你从危险峡谷中步向坦途，使你得到新的生命新的希望，支持着你的理想永不泯灭。

Optimism is the lamp of hope， it guided you step from the dangerous valley to the royal road to learning， to make you get new life new hope， support the cause of you will never end。