[译] 别忘记把这两件行李带走。
[误] Don’t forget to take the two luggages with you.

[正] Don’t forget to take the two pieces of luggage with you.
[注] luggage是“行李”的总称，属不可数名词，表示“一件行李”，应该说a piece of luggage，“两件行李”，就是two pieces of luggage。