深层意思是坚强、严格、有主意不受影响的人。He is really a tough cookie and I do admire him for his ability to deal with sticky situations.
举例: 1 + 2 = 3 augend + addend = sum。口语表达: dy/dx 全称为 the derivative with respect to x of y 或者 the derivative of y with respect to x，简读为d y over d x。
例句:It was in his darkest hours only that he referred to himself in the third person.第三个，无论男小三还是女小三，他们都是破坏别人家庭的人。
纽约时报——The New York Times网址：https://www.nytsyn.com/经济学人——The Economist网址：https://www.economist.com1.department/dɪˈpɑːtmənt/ n.
of后可跟具体名词，也可跟抽象名词，在句中作表语或后置定语，表示类别或性质。15. A clean environment can help the city bid for the Olympics， which _____ will promote its economic development.
