be on a trip meaning in Chinese

在旅行

Have you ever been on a trip ? where have you been ? what have you done
你曾经去旅游过吗？你都去过哪？ ? ?你都做了什么？
" some people like to buy orchids from other places as souvenirs when they are on a trip
有些外游人士喜欢购买兰花作为纪念品。
" people may like to buy wildlife products as souvenirs when they are on a trip
发言人表示：市民出外旅游时，可能会购买一些用动植物制成的纪念品。
" people may be tempted to buy wildlife products as souvenirs when they are on a trip abroad
发言人表示：市民出外旅游时，可能会购买一些用野生动植物制成的纪念品。
" the public should pay more attention when buying wildlife products as souvenirs when they are on a trip
发言人说：市民出外旅游时，若购买一些用动植物制成的纪念品，需特别小心。