[plt-scheme] possibly silly question

hi

i'd like to know if there is some way of adding strings (sorry, i don't what
the correct term for this is, maybe variable interpolation?) like for
example in ruby it would be like

str = "sdfdsf"
puts "something" + str
output: "somethingsdsdf"

the function string-append isn't what I want, because i would be adding
strings somewhat arbitarily in between other strings
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