negative plate的用法和样例：
例句
- Negative plates generally used litharge as the lead oxide material.
负极板一般用氧化铅做活动性物质材料。 - On the other hand, prepared negative plate expander is commercially available.
另一方面，在商业上可购到现成的负极板膨胀剂。 - I want 2 enlargements printed from this negative.
我要用这张底片印两张放大照片。 - How many copies do you want to print from the negative?
你想用这张底片印几张？
