Mrs Reagan became one of the most influential first ladies in US history during her husband's presidency from 1981 to 1989.

Lady Bird Johnson was one of the wisest and strongest first ladies who ever lived in the White House.

约翰逊总统夫人在入主白宫的众位第一夫人中，属于聪明绝顶、而又坚强泼辣者之列。

Here's your first ladies.

这些就是你的“第一夫人”们。

First Ladies rule the State and state the rule: ladies first.

第一夫人统治这个国家并规定：女士优先！

All I know, if this Joker delivers the first ladies.

反正，如果那家伙抓到了“第一夫人”们。

Application of Union Bolting Support in Malan Coal Mine 12306 Pulley Roadway

全锚支护在马兰矿12306皮带巷的应用

The passenger orders a ticket through 12306 websites, do not need to pay any services fee.

旅客通过12306网站订票，则不需支付任何服务费用。

Nevertheless that night he went to the theatre in Berl in, took a train to Munich and slept well in his couchette .

然而那天晚上，他去了柏林的剧院，还搭火车去了慕尼黑，而且在卧铺上安然入睡。

Bifocal chord of a quadric

二次曲面的两焦点弦

Use bifocal or varifocal lenses may relieve the asthenopia. An clinical investigation on the effect of progressive lenses for juvenile myopes

如改用双焦点或渐进多焦点镜片可能有助于减轻视疲劳。渐进多焦点近视眼镜的临床应用

He also made the first pair of bifocal glassed and invented a musical instrument called the glass harmonica and the stepladder chair.

他还制作出了世界上第一幅双光眼镜，发明了玻璃碗琴和活梯。

In order to efficiently provide interpretations more precise amplitude-reserved section, we studied amplitude-preserved processing based on bifocal version of CFP technology and its parallelization.

为了能够高效率的为解释工作提供可靠的保幅剖面，开展了双聚型CFP保幅处理及并行实现的研究工作。

The entire arrangement makes it easy for this bifocal fish to spot a tasty bug flying above the water, or a bit of algae below.

由于这一系列动作使这双聚焦的鱼较为容易地发现在空中飞行美味的小虫或者是水下那一点点的海藻。

He had beautiful skin, with rosy cheeks, blue eyes, rimless round bifocal spectacles, resting on the tip of his nose.

他皮肤很好，面颊红润，眼睛深蓝，鼻梁上架着一副无框双焦眼镜。

Nowadays, these glasses are known as bifocals.

如今，这些眼镜被称作双光眼镜。

No one before had thought of bifocal glasses.

以前无人想像双焦点眼镜。

Take care when stepping on and off the escalator; take extra care if you wear bifocals.

在上下扶梯的时候一定要留神，尤其是当你还戴着眼镜的时候。

A Monocular Stereo Vision Algorithm Based on Bifocal Imaging

基于双焦成像的单眼立体视觉算法

If you are both short-sighted and long-sighted, you need bifocal spectacles or contact lenses.

如果你既是近视又是远视，你就需戴双光眼镜或隐形眼镜。

Depth estimating algorithm and precision analysis of bifocal imaging without principal point calibrating

无标定主点坐标的双焦测距算法及精度研究

Finally, a bifocal wide angel lens antenna is designed successfully by using Geometric Optics ( GO) method and commercial software MATLAB.

利用几何光学方法结合数学仿真设计软件MATLAB，成功设计出一副双焦广角透镜天线，并给出了设计方法和最终的设计参数。