be essential for/to

be essential for/to essential to还是for essential to me还是for me 有It is essential for sb to do吗 From him to be reelected ,what is essential is not that his 1.it（指代英语）is essential if one is to study medicine,for examp .it（指代英语）is essential if one is to study medicine,for exampl an essential skill for everyone wants to succed in today's w 英语翻译knowing how to use a computer is an essential skill for 英文长难句的分析.if it is essential for the listeners to understand Knowing how to use a computer is an essential skill for ever be adj to/ for