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- Has two converging lens system; the objective and the eyepiece. 有两个会聚镜头系统;物镜和目镜。
- has two converging lens system; the objective and the eyepiece 有两个会聚镜头系统；物镜和目镜
- She has two cars and in addition a motorboat. 她有两辆轿车外加一艘汽艇。
- Mary has two dimples when she smiles. 玛丽笑时露出两个笑靥。
- Every person has two nasal orifices. 一个人有两个鼻孔。
- The organ has two banks of keys. 那架风琴有两排键盘。
- The butter churn have two paddle to whip the cream. 搅乳器有两根搅棍搅拌奶油。
- This coffee-maker has two removable parts. 这个煮咖啡器有两个部分，可以拆开。
- This pudding has two pounds of fresh fruit in it. 这个布丁里有两磅鲜果。
- We have two postal deliveries each day. 我们每天收到两次信。
- The binary number system has two as its base. 二进制数字系统是以2为基数的。
- It's an easy matter to observe chromatic aberrations, with a thick, simple converging lens. 用一厚的简单会聚透镜很容易观察色差。
- I have two pairs of swimming trunks. 我有两条游泳裤。
- Each place setting shall have two glasses. 每套餐具应包括两个玻璃杯。
- The word "lady" has two syllables. "lady"这个字有两个音节。
- Imagine that we have some sort of Lens system which forms an image of an extended object. 设想我们有某种透镜系统，它对一个扩展物体成象。
- The city has two nightclubs with cabaret. 这个城市有两家有歌舞表演的夜总会。
- At that time he had two helpers. 当时他有两个助手。
- Even the simple trilobite has an eye (complete with its double lens system) that's considered an optical miracle by today's standards. 按照今天的标准，即使是简单的三叶虫，它的眼睛（完美的双镜头系统）也是一个光学奇迹。
- The highland chieftain has two daughters. 高地酋长有两个女儿。
