telescope flint glass 中文意思是什麼
telescope flint glass
解釋
望遠鏡用火石玻璃-
The lens telescope, or refractor, was vastly improved when it became possible to manufacture high-quality lenses made from flint glass.
透鏡望遠鏡,或稱折射望遠鏡,在人們能夠製造出高質量的火石玻璃透鏡以後得到了很大的改進。
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