Broadened
v. 使…变宽, 扩展( broaden的过去式和过去分词 ); 增长（经验、知识等）
🗣️ 情景例句
How come she hates birds?
她为何讨厌鸟？
What are you doing?
你正在做什么？
Thus one simple fact, a change in the number of bison, had an effect on the whole wildlife chain of the plains.
因此，出现了这样一个简单的事实--野牛数目换的变化对平原的整个野生生物链都产生了影响。