A larger and heavier aircraft must displace more air and create more lift to sustain flight, compared with small, light aircraft.

较大的重型飞机比较小的轻型飞机要移动更多的空气、制造更大的提升力以支持飞行。

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So it is suitable for precise measurement of light signal and those that can invert into light signals indirectly, such as position, distance, displace, angle and other relevant physical variables.

可适用于对光信号或是能够间接转化成光信号的物理量，如位置、距离、位移、角度等进行精确测量。

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Like Edison in New York City, solar must deliver a better service for a cheaper price if it wishes to displace the burning of oil for light.

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