美德是通过努力获得的，这完全取决于你自己。
The strength of a response tendency depends on the amount of reinforcement received.
Parents wonder why the streams are bitter, when they themselves have poisoned the fountain.
汽车工业的竞争是技术的竞争，是人才的竞争，是管理的竞争。
在这个世界上，我该爱的人是我自己。
In quantum mechanics, the act of measurement can change the state of the system being measured.