只有一次的

They stepped in to a helicopter and flew high in the sky in order that they might have a bird's eye view of the city.

有一次，他驾直升飞机让我妻子南希和我作了一次只有树梢那样高的飞行，这真叫人提心吊胆。

Carl Sagan has entertainingly described this phenomenon, musing about the destiny of bacteria that reproduce by dividing into two every 15 minutes. Says Sagan:"That means four doublings an hour, and 96 doublings a day. Although a bacterium weighs only about a trillionth of a gram, its descendants, after a day of wild asexual abandon, will collectively weigh as much as a mountain...in two days, more than thesun - and before very long, everything in the universe will be made of bacteria." Not to worry, says Sagan: Some obstacle always impedes this kind of exponential growth. The bugs run out of food, or they poison each other, or they are shy about reproducing in public.

Carl Sagan 曾经开玩笑地解释这种现象，假设有一种细菌每15分钟可以分裂一次，亦即代表每一小时复制四次，一天可复制96次，虽然单一个细菌其重量只有一兆分之一公克重，但是只要经过一天无止尽的无性生殖，其重量可能会比一座山还重，经过两天后，甚至会比太阳还重，要不了多久所有的宇宙都将由这种细菌所组成，不过 Sagan 又说，大家不必担心，上天一定会安排障碍来阻止其倍数成长，有可能他会耗尽食物，或是毒死自己，或是有可能羞于在大庭广众之下复制。

Carl Sagan has entertainingly described this phenomenon, musing about the destiny of bacteria that reproduce by dividing into two every 15 minutes. Says Sagan:"That means four doublings an hour, and 96 doublings a day. Although a bacterium weighs only about a trillionth of a gram, its descendants, after a day of wild asexual abandon, will collectively weigh as much as a mountain...in two days, more than the sun - and before very long, everything in the universe will be made of bacteria." Not to worry, says Sagan: Some obstacle always impedes this kind of exponential growth.

Carl Sagan 曾经开玩笑地解释这种现象，假设有一种细菌每 15 分钟可以分裂一次，亦即代表每一小时复制四次，一天可复制 96 次，虽然单一个细菌其重量只有一兆分之一公克重，但是只要经过一天无止尽的无性生殖，其重量可能会比一座山还重，经过两天后，甚至会比太阳还重，要不了多久所有的宇宙都将由这种细菌所组成，不过 Sagan 又说，大家不必担心，上天一定会安排障碍来阻止其倍数成长，有可能他会耗尽食物，或是毒死自己，或是有可能羞于在大庭广众之下复制。

Once he piloted my wife Nancy and me in his helicopter on a hair-raising ride at treetop level.

有一次，他驾直升飞机让我妻子南希和我作了一次只有树梢那样高的飞行，这真叫人提心吊胆。

In the 5000 years' history of the Chinese culture there have been only two real cultural revolutions. One is the "proscribing all non Confucian schools of thought and espousing Confucianism as the orthodox state ideology" in the Han dynasty, hoisting the only banner of Confucianism through eliminating the other hundred schools.

纵观五千年的中国文化发展史，真正意义上的文化革命只有两次：一次是汉代的&罢黜百家，独尊儒术&，通过革文化百家之命，树儒学一家之帜，儒家文化从此成为中国文化的主流；另一次就是彻底地把儒学掀翻下马的&五四&运动。

The secondaries of the transformers are connected in parallel through a special type of device, called a network protector, to a secondary bus.

二次点状网络对大负荷供电最可靠，只有当所有的一次馈电线同时发生故障，或故障发生在二次母线上，电源才会中断。

The chant of the Divine Order is more solemn than in other convents; more time is devoted to mental prayer; the fast is extremely strict, the silence all but uninterrupted; only once a fortnight the hermits after the manner of the ancient anchorites, assemble for a conference on some spiritual subject; many volumes of such conferences are still preserved and some have been printed.

呼喊声的神圣秩序，是更为严肃的，比其他修道院；更多的时间用於精神祈祷；快，是极为严格的，所有的沉默，但不间断的，只有一次，双周的隐士后地的古代anchorites ，组装为会议就一些精神上的问题；不少卷这样的会议仍然保留，并与其中一些人已被加印。

Off we went again. After twenty minutes we reached a tiny village with 15 chalets, no electricity but one restaurant.

我们再一次上路了。20分钟以后（期间又有三次喝水休息时间），我们到达了一个很小的村庄，只有15间山地农舍，没有电但是有一间旅店。

This was the only time that bobsledding was not included in the Olympic programme. As the Games were held in California, it seemed fitting that the chairman of the Pageantry Committee in charge of the Opening and Closing Ceremonies was none other than Walt Disney.

雪橇比赛，因为只有9个国家报名，组委会认为不值得花大笔钱兴建一条雪橇的比赛场地，因此拒绝为了举办雪橇比赛专门兴建一条比赛赛道并宣布不举办雪橇比赛，这是雪橇比赛第一次也是唯一一次在冬季奥运会中缺席。

Just one last dance...oh baby..just one last dance we meet in the night in the spanish cafe I look in your eyes just don't know what to say It feels like I'm drowning in salty water Afew hours left'til the sun's gonna rise tomorrow will come an it's time to realize our love has finished forever how I wish to come with you how I wish we made it through Just one last dance before we say goodbye when we sway and turn round and round and round it's like the first time Just one more chance hold me tight and keep me warm cause the night is getting cold and Idon't know where I belong Just one last dance The wine and the lights and the Spanish guitar I'll never forget how romantic they are but I know, tomorrow I'll lose the one I love There's no wayto come wyth you it's the only way to do Just one last dance before we say goodbye when we sway and turn round and round and round it's like the first time Just one more chance hold me tight and keep me warm cause the night is getting cold and Idon't know where I belong Just one last dance

我们来到我们第一次见面的西班牙咖啡馆，看着你的眼睛，我真的不知道要说什么好……明天的太阳还有几个小时就要升起，只有那么短暂的几个小时了，到了明天，我知道，我们之间的爱就会永远、永远的结束……其实我多么希望能够跟你在一起；一辈子都在一起……只有最后的一只舞了，在我们分开之前的，最后的一只，我们像我们第一次见面那样，转啊，转啊……这是最后的一次我们彼此紧紧相依，感受对方的体温，因为夜越来越冷，寒冷到我甚至不知道自己到底属于哪里……最后的一只舞，那摇曳的红酒，那暗昧的灯光，还有那个西班牙吉他，我不会忘记它们有多么的浪漫。但是我知道，明天即将到来，我就会永失我爱……只能这样了，我没有办法跟你厮守……那就跳这最后的舞吧，最后的一只舞，只有这最后的一只舞

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。