1. 首当其冲的就是人口流动增多。 拜廉价航空旅行所赐,过去荒无人烟的地区,现在挤满了度假的背包,他们或游泳或浮,或冲浪或跳水,不亦乐乎。
No. 1 is quite simply the growth in mobility, with cheap air travel and package vacations enabling people to swim, snorkel, surf or dive in places that previously had no human presence.

来自互联网

2. 首当其冲的就是人口流动增多。 拜廉价航空旅行所赐,过去荒无人烟的地区,现在挤满了度假的背包,他们或游泳或浮,或冲浪或跳水,不亦乐乎。
No. 1 is quite simply the growth in mobility, with cheap air travel and package vacations enabling people to swim, snorkel, surf or dive in places that previously had no human presence.

来自互联网