The primum mobile of his gravitation was apparently the equatorial telescope which she had given him, and which he was carefully adjusting by means of screws and clamps.
他引力的主要动力显然是她给他的赤道望远镜， 他正在用螺丝和夹子小心地调整它。
Equatorial telescope
原声例句
塔中恋人（下）
英语百科
Equatorial mount
An equatorial mount is a mount for instruments that compensate the rotation of earth by having one rotational axis parallel to the Earth's axis of rotation. This type of mount is used for astronomical telescopes and cameras. The advantage of an equatorial mount lies in its ability to allow the instrument attached to it to stay fixed on any object in the sky that has a diurnal motion by driving one axis at a constant speed. Such an arrangement is called a sidereal drive.
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