🗣️ 情景例句
used for new books
被用来购买新书
I visited her last Wednesday.
我上个星期三拜访她。
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。