我不是孩子，我是成人。
It is a common experience that a problem difficult at night is resolved in the morning after the committee of sleep has worked on it.
Every small action counts when it comes to protecting our marine ecosystems.
No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.
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。