您要查找的是不是：
- neutral density disc 中性滤光片
- Double density disc: A floppy disc which can store twice as much information as its single density counter part. 双倍密度磁碟:能贮存双倍数据的软磁碟。
- Unsafe filters include color film, some non-silver black and white film, medical x-ray films with images on them, smoked glass, photographic neutral density filters and polarizing filters. 任何彩色负片、不含银的黑白负片、被烟熏黑的或用墨汁涂黑玻璃片、太阳眼镜、拍摄用中性减光滤镜、偏振镜、磁盘、光盘等，都是不安全的，肉眼看不见的光线（比如红外线）可能大量穿透这些物品，长时间观看会对眼睛造成很大伤害，因此请不要使用这些替代品进行观日。专业的日食观测镜请到专业可信赖的机构购买。
- Linear gradient neutral density filter 线性变密度中性滤光片
- Optical quality control of high density disc formats 高密度光盘的光学质量控制
- He has a rather neutral character. 他品性平平。
- Have you recorded the data in disc? 你已把那些数据存储到磁盘上了吗？
- That country remained neutral in the war. 那个国家在那场战争中保持中立。
- Put the gear lever in the neutral position. 把变速杆推到空挡的位置。
- You can't copy your file with this disc; it's full. 你不能用这张磁盘拷文件，这张盘满了。
- The edge of the disc had been machined flat/smooth. 圆盘的边缘已用机器磨平[光]。
- He pushed the handle into neutral. 他将手柄扳到空挡。
- He wears an identity disc round his neck. 他脖子上挂著身分牌儿。
- The water was of a pale, neutral color. 这水是一片淡灰色。
- The compact disc is a miracle of modern technology. 激光唱片是当代技术的奇葩。
- He remained neutral during the debate. 他在辩论中保持中立。
- When you start the car, make sure it is in neutral. 确定在空档才发动车子。
- Late-night disc jockey programs are very popular these days. 最近一个时期，深夜播放流行音乐唱片颇受人们欢迎。
- I waited, but her eyes were neutral. 我等着她的反应，但她的眼睛没有露出情感有什么变化。
- In ancient times the earth was conceived as a flat disc. 在古代人们认为地球呈扁平的圆盘状。
