翻译:

教授的航班又晚点了，大概是恶劣的天气所致吧。

The professor's flight was late again, presumably due to the bad weather.

（参考翻译：The professor's flight was delayed again, presumably because of the bad weather. 或 Presumably, the bad weather delayed the professor's flight.)

场景:她不想起床，大概是心情不好。

造句:She doesn't want to get up, presumably because of her bad mood.