“有必要”的英语可以翻译为：oblige，be necessary ...

“有必要”的拼音为：yǒu bì yào...

有必要让公众在充分知情的状况下展开辩论。There needs to be a properly informed public debate.我认为有必要考虑到各种可能性。I think one's got to consider all the possibilities.我认为我们有必要走开一下去考虑这件事。I think we need to go away and think about this....