A robot arm from the endeavour will grab the telescope and h

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A robot arm from the endeavour will grab the telescope and hold it while
A 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

时间状语从句,主将从现.
再问：什么叫主将从现
再答：主句是一般将来时，从句用一般现在时替代一般将来时。A robot arm from the endeavour will grab the telescope and hold it 是主句，while the astronauts make the necessary repairs是从句。

A robot-arm from the endeavour will grab the telescope and h A robot arm from the endeavour will grab the telescope and h a robot-arm from the endeavour will grab the telescope a robot-arm from the Endeavour will grab the telescope. 请问为什 A robot-arm will hold the telescope (for /so that)the astron A robot-arm from the 'Endeavour'为什么这里要用from而不用of?有什么区别啊?robo A robot-arm will hold the telescope___the astronauts to repa grab the telescope and hold it while the astronauts make the This robot arm can lift and hold things.This robot arm can h 恩 i gave the girl wink and turned my（）away from her.A .arm 英语填空：He had a f__ from the tree and broke his arm. 3.( ) at from this angle,the building resemble a robot.