to spare是什么用法及意思,在句子中啥成分we have an hour to spare,是嘛意思

to spare是什么用法及意思,在句子中啥成分we have an hour to spare,是嘛意思 spare在此句子中的意思原句：The storm appeared to spare satellite and power systems as it shook the Earth’s magnetic field Thursday.问：请问此句子中特别是spare是啥意思啊? to spare 的意思和用法可以举例句说明,尽量别复制 right down to的意思及用法 relate to 的意思及用法 in order to 的意思及用法 sad to say意思及用法 going to的意思及用法? have meaning to 的意思及用法 ought to的意思及用法 be blind to 和 turn a blind eye to 的用法举例3个及用法.意思是什么？ They made full use of the time they could ___ to do experiment.填spare.只知道spare time to do,求解释这里spare to do 是什么用法. 求解释course在一个句子的意思和用法“At present,many universities offer a variety of elective coursed and many college students prefer to have electives in their spare time.”（出自07年12月四级范文）中的coursed是动词过 人名+once用法及意思是什么? be blind to 和 turn a blind eye to 的用法举例3个及意思.意思是什么？ spare的用法?in spare time people often like watching tv的意思~ spare ,extra 区别语法,用法,意思上的区别 spare no effort to do sth 是固定用法吗?