Sterns
n. 苛刻的( stern的复数形式 ); 严格的; 严肃的; 严厉的
🗣️ 情景例句
at ten o'clock tomorrow morning.
明天上午十点钟。
No, it isn't. It's a bus.
不，那是一辆公共汽车。
It is not a simple competition for a fixed amount of food determined by the physical environment,
它已不是为了争得物质环境所决定的有限食物而进行的简单竞争了，