Englishfor English speakers
portfolio
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noun
a large, flat, thin case for carrying loose papers or drawings or maps; usually leather
he remembered her because she was carrying a large portfolio
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noun
a list of the financial assets held by an individual or a bank or other financial institution
they were disappointed by the poor returns on their stock portfolio
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noun
the role of the head of a government department
he holds the portfolio for foreign affairs
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noun
a set of pieces of creative work collected to be shown to potential customers or employers
the artist had put together a portfolio of his work
every actor has a portfolio of photographs
function
Noun
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Something or someone's function is its purpose or its job.
The army sometimes performs a policing function.
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A function is an organised event.
I met Sylvia at a church function last week.
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If mathX/math is a function of mathY/math, then mathX/math exists because of or is affected by mathY/math
The speed of the computer is a function of its main processor.
When you see, mathY=f(X)/math, you read it, "mathY/math is a function of mathX/math". Here the value of mathY/math depends on the value assigned to the variable mathX/math.
function
Verb
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If something is functioning, it is working and is not completely broken.
Her heart stopped, but her brain continued to function.
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If something functions as mathX/math, it does the job of mathX/math.
In this sentence, "sentence" functions as the subject.