grab the telescope and hold it while the astronauts make the necessary repairs.repairs是什么词性且为什么加s呢?

A robot-arm from the endeavour will grab the telescope and hold it 这里的from是什么用法,为什么不用of ,是不是from有种脱离的意思 A robot arm from the endeavour will grab the telescope and hold it whileA robot arm from the endeavour will grab the telescope and hold it while theastronauts make the necessary repairs.为什么这里用while.while不是加doing的吗 repairs在句中是什麼成分,它的词性是什麼?while the astronauts make the necessary repairs.repairs在句中是什麼成分,它的词性是什麼?A robot -arm from the Endeavour will grab the telescope and hold it while the astronauts make a robot-arm from the Endeavour will grab the telescope. 请问为什么from前面不加is,is from不是一个词组吗,是来自的意思,可这句书上的原句却只有一个from,这是什么语法现象 英语“grab the grab the grab a grab a grab a grab the telescope and hold it while the astronauts make the necessary repairs.repairs是什么词性且为什么加s呢? “will be +动词ing” 和“ will +动词”有什么区别?在新概念2 61课看到 “the shuttle endeavour will be sending up four astronauts to repair it 还有一句a robot -arm from the endeavour will grab the telescope and hold it grab the credit是什么意思 what is the sepcial importance of a telescope in space grab a tissue是什么意思 grab a tissue是什么意思 grab a highlighter是什么意思? the principle of the telescope grab the spoon 看很多文章上写 grab the a robot-arm from the endeavour will grab the telescopea robot-arm from the Endeavour will grab the telescope1：这里的 from the Endeavour 2:3:Endeavour 意思