If something is simple (say, having everybody code alone) but it isn't effective, than it's not the simplest thing that could possibly work.
如果有些事情虽简单(比如，让每个人独自编码)但没有效果，那么它并不是行之有效的最简单的事情。
2
Europeans and Americans may be making their venerable partnership more modest, less messianic—and possibly more effective.
美欧有可能使他们有价值的伙伴关系更适度，更少龌龊，有可能更有效。
3
A vaccine can prevent yellow fever. Experts say the vaccine is safe and very effective. The protection continues for at least ten years and possibly for life.