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- finite lens length 有限透镜长度
- A typical lens has a focal length(f)of 625 mm. 常见镜头的焦距（f）为625毫米。
- Determine the focal length of your lens. 决定你镜头的焦距。
- This lens can magnify 20 diameter. 这个透镜能放大20倍。
- My walking stick is the same length as yours. 我的拐杖和你拐杖长度一样。
- Some adjustment of the lens may be necessary. 可能有必要调节一下镜头。
- This car will turn in its own length. 这种汽车可以在自身长度范围内掉头。
- Do you have soft contact lens care product? 有没有软性隐型眼镜保养用品？
- I arrived at that city at length. 我最终到达了那个城市。
- He uses lens to make things appear clearer. 他用镜片以便看东西更清楚些。
- The lens is often used to make telescopes. 镜片常被用来做成望远镜。
- A finite increment in a variable. 变量增量变量的有限增量
- This river is ten times the length of that River. 这条河的长度是那条河的十倍。
- She paced out the length of the room. 她用步子测量了房间的长度。
- Don't smear the lens; I've just polished it. 别把镜头弄脏了，我刚刚擦过。
- He fished a length of string out of his pocket. 他从口袋里掏出一条绳子。
- You spend a ridiculous length of time in the bath. 你洗澡用那麽长时间，真不像话。
- Promotion will go by length of service. 晋升以服务年限为准。
- He measured the length of the room. 他量了房间的长度。
- She paced out the length of the garden. 她用步子量出了花园的长度。
