photographic negative的用法和樣例：
例句
- I want 2 enlargements printed from this negative.
我要用這張底片印兩張放大照片。 - "A science fiction cannot not be regarded as a mere entertainment, but in fact it tells the reader much more."
"科幻小說不能簡單地看成是供消遣的，而實際上它給讀者展示更深刻的內容。" - One has to process a photographic film to print pictures from it.
必須先處理照相底片才能沖印出相片。 - The development of photographic films requires a dark-room.
沖洗照相底片需要暗室。
