Osteon
n. [医]骨单位(密质骨构造的基本单位)
🗣️ 情景例句
We are four in all.
我们家共有四口人。
Each man is the architect of his own fate.
命运掌握在自己手中。
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。