无论多么复杂或精细,所有行为都可以用刺激和反应来解释。
Great companies don't just adapt to change; they anticipate it and shape the future.
I'm not going to let anyone take away my happiness.
The existence of a legal system is a matter of social fact.
质量安全是水产品的生命线,我们必须严把质量关。