astrolabe GRE

1.Finally,the tall, imposing figure sighed deeply and placed the astrolabe on a table that was no longer there, andvanished.

最后，这个高大、引人注目身影松了口气，把星盘放到一张早已不存在桌子，消失了。

2.Sophisticated instruments which were to make possible the European voyages of discovery, such as the astrolabe , the quadrant, and good navigational maps, were also developed by Muslims.

复杂仪器使得欧洲人得以进行险,例如星盘、象限仪及好航图都是由穆斯林所发明。