翻译“a vital part of a balanced ecosystem”

翻译“a vital part of a balanced ecosystem” What is a vital part of improving your grade?是什么意思 翻译：a vital component of welfare reform a vital They are a precious part of our cultural heritage--it is of vital importance that we do something.I 翻译 A certain amount of stress is vital to provide motivation. a part of our development短语翻译 A small part of a part of the part of part of 区别 请问It is of vital importance...这里为什么会有of?一般感觉不是应该是It is vital important...或者It is a vital importance... 翻译What part of watermelon is used as a vegetable? She was part of a group picture taken翻译下. it's a beautiful part of the country怎么翻译 used to be part of a large unit翻译 You'll always be a part of me 翻译中文 failure of vital organs怎么翻译 Sometimes a part of us must die before another part can come to life怎么翻译 英语翻译Since its first breakthrough in the streptomycin studies,randomization of trials has quickly become a vital part of an ethical trial.It is essential to assure an unbiased test,as it literally places each subject randomly into control and