The mechanical property and form birefringence of hard elastic PP fiber on stretching in the media

Insensitivity to Polarization of Null Coupler Acoustooptic Switch by Using Form Birefringence From zero Hero

用形状双折射实现零耦合器声光开关偏振不敏感

Asymmetric waist cross section couplers are analyzed theoretically. Experimental results show that form birefringence of a coupler with an asymmetric waist cross section changes from positive to negative at a given degree of fiber fusion resulting in polarization insensitive operation.

对光纤型非对称束腰横截面耦合器进行了理论分析，并在实验上证明了耦合器的形状双折射随光纤的熔融程度从正到负的变化，最终可以达到偏振不敏感的目的。

The chicken replied, "Don't give it another thought. That's the mighty eagle, the king of all birds-you could never be like him!" And the eagle didn't give it another thought.

山鸡回答说：“不要想了，那是凶猛无比的鹰，鸟中之王——你不可能像他一样！”于是鹰放弃了那个念头。

Once there was an eagle, king of the birds, who often flew over the valley to seek for food.

从前有一只老鹰，他是鸟中之王，常常在山谷上方飞翔找食物。

I'm king of the birds! And I'm king of the bees!

我是小鸟的国王！我是蜜蜂的国王！

The owl cried," You are the king of birds, but you don't know that no mother would not consider their children the most beautiful in the world!"

母猫头鹰哭着说，“你是鸟类之王，但是你不知道没有一个母亲不认为自己的孩子是世界上最美丽的！”

The summer birds, resident birds, travel birds and winter birds are respectively 23, 21, 11, 2. The species of Palaearctic realm, widespread and Oriental realm are respectively 29, 22, 6.

夏候鸟、留鸟、旅鸟、冬候鸟分别为23、21、11、2种；古北界、广布种、东洋界鸟类分别为29、22、6种。

Apart from the resident birds, South Africa hosts birds from further north in Africa, the Arctic, Europe, Central Asia, China and Antarctica during the year.

除了留鸟，南非全年都接待来自非洲最北部、北极、欧洲、中亚、中国和南极洲的各种鸟类。

Magpie is widespread resident birds in the North of China. The amount of magpie has evident pertinence with the quality of urban ecological environment.

喜鹊是我国北方城市的留鸟，其数量的多少与城市生态环境质量有明显的相关性。

Survey of bird malaria infection for partly migrant and resident birds in Danli, Yunnan Province

云南部分候鸟和留鸟疟原虫感染情况的调查

The decrease of water area and plantation made many resident birds can not find a place to live through the winter.

水域面积、植被覆盖率的减少，使栖息和越冬鸟类丧失了大量的栖息地。

But others were hatchlings and resident birds-indicating the parasite can complete its full life cycle in the Great White North.

但是其他的则是雏鸟和留鸟，这表明寄生虫能够在北部大雪原完成生命循环。

The positive rate of migratory birds is higher than resident birds.

候鸟的阳性率极显著高于留鸟。

If you get up early in the bird does not eat worms, that will be eaten by other birds.

如果早起的那只鸟没有吃到虫子，那就会被别的鸟吃掉。

Bird We are gonna get the ball to Bird, win this thing and get the hell out of here.

我们把球传给，赢了这场比赛，不就行了么？

Well into the session, the youngsters were digging in, moving basic command blocks to get the Angry Bird to its prey, and then playing with slightly more complex commands like "repeat" and learning about "if-then" statements, an elemental coding concept.

活动过程中，现场的孩子都全情投入，移动着基本的指令模块，让愤怒的小鸟抵达目标，然后使用稍微复杂一些的命令，比如“重复”，并学习“if-then”语句——一个基本的编程概念。

Well into the session, the youngsters were digging in, moving basic command blocks to get the Angry Bird to its prey, and then playing with slightly more complex commands like repeat and learning about if-then statements, an elemental coding concept.

活动过程中，现场的孩子都全情投入，移动着基本的指令模块，让愤怒的小鸟抵达目标，然后使用稍微复杂一些的命令，比如重复，并学习if-then语句&一个基本的编程概念。

They began to get the big bird from the spectators.

观众开始向他们喝倒采。

Well, if you're so smart, you get the bird out.

既然你那么聪明，你把鸟赶出去啊。

It is of course very useful for a migrating bird to be able to switch to a magnetic compass when clouds cover the sun; otherwise it would just have to land and wait for the sun to come out again.

具有这种磁场罗盘，对候鸟来说当然非常有用，因为如果乌云遮日，它可以以磁场为向导继续飞行，否则它就只好着陆，等待太阳重新出现。