The `--translate` option can be specified multiple times (once per translation
to be executed). The following example renames the "id" column from the input
file to "_key", and the "from" column to "_from", and the "to" column to "_to":
arangoimp --type csv --file data.csv --translate "id=_key" --translate "from=_from" --translate "to=_to"
`--translate` works for CSV and TSV inputs only.