presumption 雅思托福GRE专八

1.There is a strong presumption in favour of the truthfulness of their statement.

有一个有据足以推定他们所讲是真实。

2.The presumption is that he had lost his way.

推想起来, 他当时是迷了路。

3.What visions, what expectations and what presumptions can outsoar that flight?

怎样洞察，怎样期许，怎样假设能飞越那领空？