已经

At the beginning of the century, the mathematics and physics relevant to traditional lens design were already pretty well established, and early designs like achromatic doublets and the Petzval lens had already been developed.

上个世纪初，传统镜头设计的数学，物理框架已经建立得比较完备。早期的设计，如消色差胶合透镜，Petzval镜头已经被发展的很好了。

ReCAPTCHA is virtually immune by design, since it selects words that have resisted the best text-recognition algorithms available, says John Douceur, a member of a team at Microsoft that has built a CAPTCHA-like system called Asirra.

John Douceur是一个微软研究团队的成员，该团队已经创建了一个类CAPTCHA的验证码系统，叫作Asirra。他说："多重验证系统从设计上来说无懈可击，因为它选择的词汇已经将现有最好的文本识别程序拒之门外。"

But the flames were still roaring and spreading, despite the best efforts of 10,000 firefighters to douse and contain them.

风速已经从先前的最高100英里/小时减了下来，这让人们觉得最难的一关已经闯了过去。

I have been back in England for a quick visit and I was struck by an outburst that Hull boss Iain Dowie aimed at his squad.

我已经回到英格兰进行一次短暂的访问（现在完成时不一定要写已经两个中文字）；说实话（这三个字作为语气的调整很必要咩？），胡尔城主教练伊恩·道伊对球队的爆发把我雷到了。

It had been raining cats and dogs for over a week and the downpour had caused landslides in many places.

暴风雨已经下了一个多星期了，持续的降雨已经使许多地方出现了滑坡。

I've scanned the papers at 300 and 600 dpi and I've saved the images in bitmap and JPEG format.

我已经扫描的文件在300和600 dpi和我已经保存的图像位图和JPEG格式。

More than half of his Seven Day Silence for his father had been spent there, and it had been difficult to draw him away.

为他的父亲超过一半的他七阵天沈默已经在那里被花费，而且它已经是困难的拉他离开。

No, we draw lots already won and won games already draw.

不，我们在已经领先的比赛中打平过，也在已经打平的比赛中打赢过。

Before the tower's side door had swung shut behind him he was on the draw-bridge; seconds later he was pounding on Morgenes' door.

塔的侧门还没有在他身后关上，他就已经到了可开闭的吊桥上；几秒钟之后，他就已经在狂砸Morgenes的房门。

Dredging started in 2004 and as of March of 2007 The World is around 90% complete.

挖沙的工作已经在2004年开始了，到2007年的3月，全部工程已经完成了90%。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。