底片的英文：
negative
photographic plate

参考例句：

printable negatives.
可冲印的底片

This is a negative film.
这是一张底片。

It's Kodak color 135.
这是柯达135彩色底片。

(in photography)sheet of(esp)glass coated with a film sensitive to light
(照相用的)感光底片,(尤指)玻璃感光片

Half-tone positive: A positive film image produced by projecting a continuous-tone negative through a screen.
半色调阳片:经半色调网片投射连续色调底片所得的菲林正片。亦称网点阳片。

Infrared negative
红外底片

The development of photographic films
冲洗底片

Black-and-white dupe negative film
黑白翻底片(摄影)

Photograph (printed from a negative)
(由底片印出的)照片

Black-and-white negative film;negative film monochrome
黑白底片(摄影)

negative是什么意思：
adj. 否定的；反面的；负的阴性的
n. 否定，拒绝；负数
v. 否定，拒绝

Their criticism was not negative.
他们的批评并不是负面的。

The vote is in the negative.
投票表决的结果是反对。

A negative vote or voter.
反对票，投反对票的人

plate是什么意思：
n. 盘子，碟子；一盘食物；金（银）餐具；金属板；门牌；名牌；车牌
v. 为…加设钢板

This is the plate that hexed.
这就是那块施过魔法的盘子。

We have rectangular plates, square plates, triangular plates and oval plates.
我们有矩形的盘和正方形的盘，还有三角形的盘，还有椭圆盘。

Rubber plate: A type of plate for flexographic printing. It is a type of duplicatinf plate by moulding.
橡胶版:是一种胶版印刷用的印版。它是用模造式制成的一种复制版。