Shrewder
a. 精明的( shrewd的比较级 ); 敏锐的; 有眼光的; 精于盘算的
🗣️ 情景例句
That's a great idea.
这是一个绝妙的主意。
Today is my birthday.
今天是我的生日。
This is because they had no natural enemies until the arrival of humans and therefore did not need to develop flying wings.
这是因为人类到达这里之前，这些鸟没有天敌，因此，它们不需要发育飞行的翅膀。