1. Orbit：Operands运算物体;运算对象 | Orbit环游 | Orbit Camera环游摄影机
2. round trip：return ticket:来回票 | round trip:环游 | season ticket:月季票
3. 环游什么意思
3. round the word：pretty good相当好 | round the word环游 | take photos 照相
4. travel around：19.Prefer ...to...比起...更喜欢... | 20. travel around 环游 | 21.Knock into 与...想撞