??? 情景例句
In North America when people meet each other for the first time.
在北美，當人們第一次彼此見面時。
Let me introduce myself.
讓我做個自我介紹吧。
It is not a simple competition for a fixed amount of food determined by the physical environment,
它已不是為了爭得物質環境所決定的有限食物而進行的簡單競爭了，