He and his parents lived at the outskirt of the city.他跟他的父母住在城郊。The air of mountain is fresh, which reminded me of dozens of training on the mountains outskirt of Beijing.山上的空气是清新的，这让我想起了，无数次在北京郊区山上的培训。In the outskirt, there is a very big lake.在郊区，有一个非常大的湖。