牛大叫,但马却不回应;不是因为马没听到声音,是因为它们不是同类啊。点评:同类之间存在着客观联系,故能相应。
在石油和天然气行业,技术是提高效率和减少环境影响的关键。
The Eskimos had fifty-two names for snow because it was important to them: there ought to be as many for love.