语法总结
have proved that...
Experiments have proved that... 是典型“研究结果表明”结构。
相似句：
- Studies have proved that exercise helps.
- Experience has proved that he was right.
so ... that ...
so accustomed to swimming that... 用结果从句强调能力发展程度。
相似句：
- He was so tired that he fell asleep.
- She was so careful that she noticed every detail.
Whether ... only time will tell
这是对未来结果保持开放判断的经典写法。
相似句：
- Whether it will succeed, only time will tell.
- Whether they will agree, only time will tell.