如果我理解正确的话，即基于str模式为每行数据创建一个字符串，你可以使用glue::glue来实现你想要的结果，如下所示：

library(tidyverse)

df <- tribble(
  ~title, ~name, ~age,
  "Mr", "Smith", 46,
  "Ms", "Jones", 26,
  "Ms", "Wiles", 20
)

str <- "
This has parameters {{title}} {{name}}
and more {{age}}
"

df %>%
  mutate(
    output = glue::glue(str, .open = "{{", .close = "}}")
  )
#> # A tibble: 3 × 4
#>   title name    age output                                    
#>   <chr> <chr> <dbl> <glue>                                 
#> 1 Mr    Smith    46 This has parameters Mr Smith
#> and more 46
#> 2 Ms    Jones    26 This has parameters Ms Jones
#> and more 26
#> 3 Ms    Wiles    20 This has parameters Ms Wiles
#> and more 20

字符串