1、

The lens telescope, or refractor, was vastly improved when it became possible to manufacture high-quality lenses made from flint glass.

透镜望远镜,或称折射望远镜,在人们能够制造出高质量的火石玻璃透镜以后得到了很大的改进。

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2、

the widespread progradationally deposited cycles are often capped by oolitic shoals, tidal flat or sabkha evaporite strata.

广布的加积沉积旋回、经常被鲕滩,潮坪或萨勃哈蒸发岩层所覆盖。4.Oolitic hematite is considered as one of the most refractory iron ore type.鲕状赤铁矿石是目前国内外公认的最难选的铁矿石类型之一。

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3、

a corner cube is adopted to act as a refractor, forming a folding optical resonant cavity;

此激光器采用角隅棱镜作折光器构成折叠式光学谐振腔。

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4、

This refractor is perfect for everyone!

这折射镜是极其精美的,对每一位同好!

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5、

The refractor is light weight, portable and can be used for either visual or CCD imaging.

该折射的是重量轻, 携带,可用于无论视觉或ccd成像.

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6、

A three-inch refractor will give an excellent view as well as showing Titan.

一架三英寸的折射望远镜就能看到极好的景象,还可以看出土卫六.

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7、

A three-inch refractor will give an excellent view.

一架三英寸的折射望远镜就能看到极好的景象.

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