Translation

• statistical variation

Examples

• 天气日渐变差。
  The weather was getting worse and worse.
• 今天下午天气会变差。
  The weather will change for the worse this afternoon.
• 由于天气变差，出发延迟了。
  Due to the worsening weather, the departure was delayed.
• 这些天我的视力正在变差。
  My vision is getting worse these days.