Even a slender diplodocus, once believed to have tipped the scales at five and a half tonnes when alive, has lost a tonne and a half from its weight.

即使是一个瘦形梁龙，曾经被认为在活着的时候重达5.5吨，现在也减重了1.5吨。

youdao

Many scientists once believed that physical similarities between identical twins are genetic, while their personalities, intelligence and other differences between them are an effect of their environment.

许多科学家曾经认为，同卵双胞胎在外貌上的相似是由基因决定的，而他们之间的性格、智力和其他差异则是受到环境的影响。

youdao

The rate at which an animal aged was once believed to be related to its size.

动物衰老的速度曾经被认为是与其体型大小相关的。

youdao

A recent report shows that the small organ has a much more important job in the body's defense system than once believed.

VOA: special.2009.08.25

He believed whatever one wag once set of monks, "I sleep, I eat, I digest," and they prayed, of course.

他对修士们的态度就像某个僧侣说的,"吃了就睡,睡了再吃",当然他们也会祈祷

耶鲁公开课 - 欧洲文明课程节选

But now it seems that T.rex may not have been as fierce as scientists once believed.

VOA: special.2009.09.01

Her son said his mother felt let down by a system she had once believed in.

BBC: Fermanagh woman 'abandoned' by health service

Richard says they once believed they could slap theSmucker name on any product and it would sell.

FORBES: The Perfect Combo

This was an interesting response from a company that once believed it could take on Netflix.

FORBES: One Less Competitor for Netflix