翻譯：教授的航班又晚點了，大概是惡劣的天氣所致吧。

The professor flight also delayed，presumably caused by the bad weather.

參考翻譯：The professor's flight was delayed again, presumably because of the bad weather. 或 Presumably, the bad weather delayed the professor's flight.

造句：這家奶茶店顧客很少，大概是因為味道不好吧。

The milk tea store has very few customers，presumably because of the bad taste.

adv，大概、可能。尤其是較正式的寫作和口語中，靈活使用

go out of business? 破產(chǎn)了

let alone 更不必說