查询词典 focus of a parabola

Battista della Porta in 1589, but it was not until 1611 that Kepler compared a lens of glass to the lens in the eye and showed that rays from each point of an object were brought to a focus at each corresponding point of an image on the retina.?

要注意not until的用法。参考译文：1589年B？巴第思塔？德拉？波尔塔出版了有关透镜的打磨与磨光的书籍，但是直到1611年，凯朴乐才比较了玻璃透镜与人眼的水晶体，并发现来自物体各点的光线都能在视网膜成像上找到对应的点。

Battista della Porta in1589, but it was not until1611 that Kepler compared a lens of glass to the lens in the eye and showed that rays from each point of an object were brought to a focus at each corresponding point of an image on the retina.

透镜可以集结更多的光束，并且依然可以象小孔一样成相，但是有一点两者不同，在小孔摄影机里，无论胶片与小孔的距离远近，光线都可以相成同样清晰的影像。

GDP figures are a focus today, while markets will be keeping an eye on Crude's decline – now trading consistently below $40/bbl.

国内生产总值数据是今天的焦点，而市场将密切关注原油价格的下跌——目前的交易价格依然是低于每桶40美元。

This focus, however, must be accompanied by three changes in shareholder relations.

然而，这种关注必须伴随着股东关系的3种改变。

Apply that focus to the bigger picture, and you'll be amazed at what you can discover.

适宜把你的注意力集中在更大的画面，在那里你所发现的东西将会使你感到惊讶。

Therefore, be thankful and appreciative of what you have and where you are on the path right now. as you focus on the present moment, you can experience the full wonder of "here"

要珍惜现在所用有的一切并心存感激如果你努力吧目光锁定在此时此刻，你就能感受到"现在"的真正美妙之处

The fact that Pluto will move signs and is one of your planetary rulers means that your focus, and even your sense of identity, will be bound up with this new effort.

它是你的主星之一，这意味着你的注意焦点，甚至是你的本位感，都和这一新的结果有关。

I've been learning kungfu for 2 mths, it helps me to focus n be carried away.

我跟他学功夫已经两个月了，帮助我集中精力，提升自制力。

Be cautious of any programs that focus more on selling than on the product itself.

要小心的任何程序更专注于销售比对产品本身。

I wanted the focus to be more central.

我想重点要更多的中央。

Although translator has turned from being a crystal ball by which the original culture can unrestrainedly penetrate to another crystal ball by which the target culture can freely traverse, the translator's personal embodiment, in the process of cognitive act, are still absent in translation studies. Translators are still subjects without body or simply disembodied subjects.

译者虽然由原语文化可以自由穿透的玻璃球变成了译语文化可以自由穿越的玻璃球，但译者认知过程中的个体体验在翻译研究中依然缺席，译者依然仅仅是一个没有躯体体验的主体。

Chillingly, he claimed our technology is 'not nearly as sophisticated' as theirs and "had they been hostile", he warned 'we would be been gone by now'.

令人毛骨悚然的，他声称我们的技术是'并不那么复杂，像他们一样，和"如果他们敌意"，他警告说，'我们将现在已经过去了。