Be far less likely to

The European and American refineries’ new owners will be far less likely to close them than their old ones.

比起他们的旧主，欧洲和美国精炼厂的新主人关闭他们的可能性要小得多。

The effectiveness of a vaccine: The research showed people would be far less likely to take an HIV vaccine if it was only 50 per cent effective in protecting against HIV infection

疫苗的有效性：研究结果表明如果HIV疫苗在预防HIV病毒感染上只有50%的有效率的话，人们接受接种的可能性将大大降低。

He finds that rates of joblessness differed primarily according to class: those in middle-class and white-collar occupations were far less likely to be unemployed.

他发现，失业率主要根据阶级不同而不同：中产阶级和白领阶层失业的可能性要小得多。