"Pack"、"luggage"、"up" 三个单词组合在一起，就是收拾行李的意思。
"Pack" 来自英语中的 "to fill a suitcase or other container with clothes, etc. so that they can be taken away on a trip"，意思是将衣物填充到手提箱或其他容器中，以便在旅行中带走。
"Luggage" 来自英语中的 "the bags, cases, etc. that people take with them when they are travelpng"，意思是人们在旅行中带着的包裹。
"Up" 来自英语中的 "in readiness for a journey or for a particular purpose"，意思是为旅行或特定目的做好准备。
例句：
Can you help me pack my luggage up before we leave? (你能帮我在我们离开之前收拾我的行李吗？)
I need to pack my luggage up for the fpght tomorrow. (我需要为明天的航班收拾我的行李。)
It's time to pack your luggage up, we're leaving in an hour. (是时候收拾你的行李了，我们一小时后就要离开了。)