They appeared not to know what was happening.

他们似乎不知道正在发生的事。

《牛津词典》

She appeared not to notice anything.

她似乎没看见什么。

youdao

Google's paid search results appeared not to have been affected.

Google的付费搜索结果似乎并未受到影响。

youdao

Also,the broken windows theory did not fully investigate the exact conditions of disorders that appeared to lead to crime.

VOA: special.2009.03.03

So, for example, when people, and we'll talk about this next class, were looking at different characteristics spectra of different atoms, what they were seeing is that it appeared to be these very discreet lines that were allowed or not allowed for the different atoms to emit, but they had no way to explain this using classical physics.

举个例子，当大家看到,不同原子的特征光谱时,他们看到的是一些分离的线,那可以使不同的原子,发射或不发射出去，但是这些无法用经典物理来解释。

麻省理工公开课 - 化学原理课程节选

It seemed to me also that every living African, whether in good or ill health, is prey to many enemies of health that would interact one upon the other in many ways within one human body, Critics feared if President Mbeki appeared to doubt the link between HIV and the disease, people would not practice safe sex and use condoms.

VOA: standard.2010.05.17

It will also want to find out why life jackets appeared not to inflate.

BBC: Search for fisherman abandoned

But while several buildings were affected, key telescopes appeared not to have suffered "major damage".

BBC: News - Australia bushfire destroys homes and damages observatory

The report said that UK ports appeared not to have learnt lessons from accidents at other ports.

BBC: Firms charged over River Clyde Flying Phantom tug deaths