You can use twofold to introduce a topic that has two equally important parts.
[formal]
The case against is twofold: too risky and too expensive.
twofold in British English
(ˈtuːˌfəʊld)
adjective
1.
equal to twice as many or twice as much; double
a twofold increase
2.
made of two parts; dual
a twofold reason
adverb
3.
doubly
twofold in American English
(ˈtuˌfoʊld)
adjective
1.
having two parts; double; dual
2.
having twice as much or as many
adverb
3.
twice as much or as many
Word origin
two + -fold
Examples of 'twofold' in a sentence
twofold
The reasons are typically twofold: poor investment returns and high charges.
Times, Sunday Times (2016)
The weakness of any such case is twofold.
Blinkhorn, Martin (ed) Fascists and Conservatives (1990)
The flaw with this argument is twofold.
Times, Sunday Times (2016)
The increase in domestic demand has a twofold effect.
Pass, Christopher, Lowes, Bryan Collins Dictionary of Economics (1993)
The reasons are twofold and closely connected.
Times, Sunday Times (2015)
The moral dilemma the case raises is twofold.
Times, Sunday Times (2007)
This would have the twofold effect of making them more mature when they reach college and more aware of the world around them.
The Sun (2007)
If my part in the conversation seems halting, the reasons twofold.
Times, Sunday Times (2008)
A family history of suicide gives a twofold increase in risk.
Times, Sunday Times (2011)
A family history of suicide appears to contribute about a twofold increase in risk.
Times, Sunday Times (2007)
The long-term concerns have been twofold.
Times, Sunday Times (2010)
But the concerns are twofold.
Times, Sunday Times (2009)
The reason may be twofold.
Times, Sunday Times (2008)
Many of the researchers use a twofold definition: forgiveness is releasing the other person from retaliation and wishing the other person well.
Christianity Today (2000)
A few tickets remain for today, but concerns must be twofold.
Times, Sunday Times (2013)
Their aim is twofold: to increase productivity and to improve morale by giving employees a feeling of participation in and identification with the company.
A Conceptual View of Human Resource Management: Strategic Objectives, Environments,Functions
We grow this herb, they pay us for it, and their crop yields have increased twofold.
Christina Dodd SOMEDAY MY PRINCE (1999)
The message was twofold, I suppose.
Times, Sunday Times (2014)
In other languages
twofold
British English: twofold ADJECTIVE
You can use twofold to introduce a topic that has two equally important parts.
The case against is twofold: too risky and too expensive.