For instance, because of poor visibility at night, Sun Yuan-hsun has to observe tawny fish owls through an image intensifier, which detects the birds 'movement and then photographs them.
例如，受夜晚視覺侷限，孫元勳不得不靠感應鳥類動作、再加以拍攝的夜視鏡觀察黃魚嗎鴞。