！call up是动副结构也是动词和介词短语结构，中文意思是，打电话给；召集；使想起；提出
It will be possible to call up on a PC screen millions of volumes from distant libraries.它可以在电脑屏幕上调用远程图书库中的数百万册书卷。
This week's comic doodle reportedly only shows in the US, unless you call up a special URL.
