7月28日电，新加坡航空一季度营收47.9亿新元；净利润1.861亿新元，同比减少59%。

Group 1 - The core point of the article is that Singapore Airlines reported a revenue of 4.79 billion SGD for the first quarter, with a net profit of 186.1 million SGD, reflecting a year-on-year decrease of 59% [1] Group 2 - The revenue figure of 4.79 billion SGD indicates the company's performance in the aviation sector during the first quarter [1] - The net profit of 186.1 million SGD shows a significant decline compared to the previous year, highlighting potential challenges faced by the company [1]