An eyepiece with wide apparent field (in degrees) and lower powers used on a telescope allow wider fields of view.

较宽的目镜视场搭配较低的放大率可以得到更宽的视场角。

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The need to mobilize knowledge from several disciplines is particularly apparent in the field of disaster risk reduction.

UNESCO: EDUCATION

But it is not apparent on the field.

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The idea of using a magnetic field as a solar sail was first suggested a few years ago, but it soon became apparent that creating a field strong enough to be useful would require exotic superconducting materials that, unfortunately, do not exist.

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