call of的用法和樣例：
例句
- Mary is always within call of her mother.
瑪麗對母親總是隨叫隨到。 - The call of this bird is very loud.
這隻鳥的叫聲很響亮。 - I once read a book call "the call of the wild", but that's beside the question.
我曾讀過一本書，叫《野性的呼喚》, 不過這與本題無關。 - The teacher helped students after school every day, even though it was above and beyond the call of duty.
每天放學后這位老師都幫助學生複習功課，儘管這不屬於他的職責範圍。
