2.A scientist never presupposes the truth of an unproved fact.
科学家从不预先假定未经证实事实。
3.So it is very indispensable to revaluate the rear hypothesis of the present capital market theory.
因此,新估价当今资本市场理论背后假定是十分。
4.(a) As has been mentioned, some postulated that phlogiston has negative weight (levity).
(a) 正如所提到,某些燃素会减轻(轻率)假定。
5.In the fitting methods of both the ordinary nonparametric regression models and the varying coefficient regression models, the error term of the models is usually assumed to be homoscedastic.