Combine an array into a string with space separator

$array = 'The','quick','brown','fox','jumps','over','the','lazy','dog.'
$array -join(' ')

Details

Uses a join to combine the strings

Example

PS C:\> $array = 'The','quick','brown','fox','jumps','over','the','lazy','dog.'
>> $array -join(' ')

The quick brown fox jumps over the lazy dog.