Concentrate all your thoughts upon the work at hand. The sun's rays do not burn until brought to a focus.

Concentrate all your thoughts upon the work at hand. The sun's rays do not burn until brought to a focus.

把你所有的思想集中在手头的工作上。太阳光线在聚焦之前不会燃烧。

-- Alexander Graham Bell 亚历山大·格雷厄姆·贝尔