光学成像系统的几个透镜组中最靠前的一个。透镜组及单个透镜都是用来改变焦距长短及视野大小的。焦距越长视野越小，焦距平方与视野面积成反比。
前组
双语例句原声例句
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目的：探讨中鼻甲前端部分切除术对前组慢性副鼻窦炎的治疗作用。
Objective: To evaluate the effectiveness of excising the head of middle turbinate in treating anterior group sinusitis.
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后组筛窦的气房一般大而宽，在数量上也少于前组筛窦，容易确定。
The posterior ethmoid cells are easily identified as they are larger, wider, and fewer in number than anteriorly.
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研究了铜—铝轧制复合的最佳工艺，并通过轧前组元金属状态、压下率和温度对复合强度的影响，了解了铜—铝复合机理．。
The best process of Cu-Al rolling compound is analysed- The Cuotl compound mechanisms are understood by the effect of the metal state, the reduced ratio and the temperature.
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The people who crossed the rickety bridge were more likely to call her up later and say, "Yeah. I'd like to talk about that experiment I was in.
前一组男学生,之后更可能联系这个女人说，“我想谈谈之前的实验。
应用推荐
$firstVoiceSent
- 来自原声例句