According to a survey by William Lindsay, about 75% of visitors to the Great Wall will litter.

威廉的调查显示，约75%的长城游客随处丢垃圾。

youdao

According to a survey by William Lindsay, about 75% of visitors to the Great Wall will litter.

威廉的调查显示，约75%的长城游客随处丢垃圾。

youdao