官员警告山上骑自行车者, 由于极端热、干道和大量使用, 今年夏天要保持安全。 Officials warn mountain bikers to stay safe this summer due to extreme heat, dry trails, and heavy use.

由于极端炎热、干燥条件和较高航道使用率的风险增加,引起人们对安全和环境影响的关切,官员正在敦促山地骑自行车者在今年夏天采取谨慎态度。 Officials are urging mountain bikers to exercise caution this summer due to increased risks from extreme heat, dry conditions, and higher trail usage, which have raised concerns about safety and environmental impact.