It is essential to study the osteotomes ,dermatomes ,and neurotomes of the lower limb to understand the extent of this block.求此段话的翻译,其中主要是osteotomes、dermatomes、neurotomes三个单、词不知如何翻译,其字面意思是

it's only with the heart that one can see rightly,what is essential is invisible to the eye 有It is essential for sb to do吗 What's the diffents of these two sentences?1.It is essential to follow the .2.It is essetial that you follow the. 16.To drive a car safely it is good brakes.16.To drive a car safely it is () good brakes.A.essential to haveB.essential withC.essential havingD.essential have 英语翻译Knowing lots of things is good,but knowing the limitationgs of one's knowledge is essential to using it peoperly. It essential that everybody know what to do 为什么 know不加s 请问,It is essential to know what you can talk about with different people. It is essential that everyone ___ what to do.A.knowB.knows为什么不是B呢? What bird is essential to eating? Hard work is essential to success. What bird is essential to eating? It is only with the heart that one can see rightly； what is essential is invisible to the eye. 关于Learning how to relax yourself is essential to being happy.解析说：is essential to ,to是介词,所以加了being happy.但不是有词组是It is essential to do sth.为什么这里就是essential加to do? It is believed that education is essential to one’s success.Does it mean that education is important merely in that it helps people get a good job?Do you think that education is important to people’s success in different dimensions of life? 求解答英语选择It's essential ___ everyone ______ what to do.为什么是that...know而不是that...knows Before giving my opinion,I think it is essential to look at the argument of both sides. People write computer programs,but it is essential for people not to make mistakes.用英语解释句子 中学英语学习中的一个小小语法点,不大懂,例句：I think it essential to reserve air tickets这一类句子中都用 it 作形式宾语请问：为什么这个例句不能改为“I think it is essential ... 感觉读来也挺顺啊.