By the middle of this century, English could fall into fifth place behind Arabic in the numbers who speak it as a first language.

到本世紀(jì)中葉国产一区鲁鲁在线视频免费播放，以英語為第一語言的人口可能少于阿拉伯母語人口中文全毛片免费播放，跌倒世界第五位国产-iGAO视频网。

The first artificial Earth satellite in the world has now been created.

世界上第一顆人造衛(wèi)星已經(jīng)誕生了免费美女黄片。

On October 4, 1957, Soviet scientists launched the world's first artificial satellite.

1957年十月四日蘇聯(lián)科學(xué)家發(fā)射了世界上第一顆人造衛(wèi)星。

Do you know who is the first astronaut in the world?

你知道誰是世界上第一個(gè)宇航員嗎黄色靓女网站？

Finally, in 1977, Takahashi Seisakusho Ltd. of Japan introduced the world's first astronomical telescope with a fluorite objective.

最終在1977年亚洲国产精品无码久久，日本的Takahashi Seisakusho有限公司制造了世界上第一架用螢石做物鏡的天文望遠(yuǎn)鏡。

This was the first water-powered astronomical instrument in the world.

這是世界上第一臺(tái)用水力轉(zhuǎn)動(dòng)的天文儀器欧美黃色。

At night there was never a traveller passed my house, or knocked at my door, more than if I were the first or last man; unless it were in the spring, when at long intervals some came from the village to fish for pouts — they plainly fished much more in the Walden Pond of their own natures, and baited their hooks with darkness — but they soon retreated, usually with light baskets, and left "the world to darkness and to me," and the black kernel of the night was never profaned by any human neighborhood.

從沒有一個(gè)人在晚上經(jīng)過我的屋子一级毛片无码不卡免费，或叩我的門，我仿佛是人類中的第一個(gè)人或最后一個(gè)人精品久久久久久无码中文版，除非在春天里狼友无码，隔了很長(zhǎng)久的時(shí)候，有人從村里來釣鳘魚亚洲一区无码精品网站性色，——在瓦爾登湖中亚洲欧洲久久精品久久，很顯然他們能釣到的只是他們自己的多種多樣的性格，而鉤子只能鉤到黑夜而已——他們立刻都撤走了国产中的精品视频，常常是魚簍很輕地撤退的日韩亚洲免费，又把"世界留給黑夜和我"，而黑夜的核心是從沒有被任何人類的鄰舍污染過的日韩综合在线七区。

The first time I came to this world, meet me at noon the sun.

我第一次來到這個(gè)世界欧美日韩精品视频一区二区在线播放，迎接我的是正午的陽光。

Of course, it is only day one, and at this point it is still easy to feel on top of the world.

當(dāng)然激情黄色视频在线观看，這只是第一天開始国产美熟女乱又伦免费视频，在這一點(diǎn)上仍是很容易的感受頂端的世界。

On a Monday morning in July, the world\'s first atom bomb exploded in New Mexico desert.

7月的一個(gè)星期一早上亚洲国产欧美日韩久久，世界上第一顆原子彈在新墨西哥沙漠上爆炸了。