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2019年04月22日 04:21:43来源:度排名免费平台

  • Anchors away, me boys-but how far?抛锚了,锚究竟该抛多远呢?On this moment of science.又到了“科学一刻“的时间了。What happens if you throw your anchor overboard and there isnt enough chain to reachthe bottom?如果你将锚抛出船外,但锚还不够长,没法触底固定,Does the anchor haul you down with it?那么锚会把船拖下水吗?This sounds a little bit like something that would happen in a cartoon.这听起来像是动画片里才能看到场景,But for sailors its nolaughing matter.但对水手来说可不是开玩笑。Its unlikely the whole ship would be pulled under, but there could very well be damage to the hull caused by not having enough chain-including a sudden hole where the anchor used to be.发生这种情况时,整艘船被拖下水可能性不大,但船体很有可能受到大的破坏,比如船上原本固定锚的地方会被突然扯出一个洞。Thats why the nautical rule of thumb is to use three times as much chain as is needed to hit bottom.所以,对于航海有条黄金法则:使用比触底所需的长度长两倍的锚。That extra chain piles up around the anchor and provides added stability.多余部分的锚链会在固定锚的周围盘起,从而加强船的稳定性。Still, what if you dont know how deep the water is?但要是不知道水有多深,Or what if you just make a mistake?或者不小心失误了怎么办?The navy has prepared for this by building what is called a “weak link” into their anchor chains.为了解决这个问题,海军设计了有“弱环”链接的锚链。The weak link is the last link in the chain, and while its strong enough to hold together in general,its weak enough to break if the whole weight of the anchor and chain is put on it.弱环是锚链的最后一环,通常它可以紧扣锚链,在受到整条锚链的重力时才会断裂,The weak link there is as a safety valve.就像一个安全阀门。Because its the very last link, under normal circumstances it never getsplayed out at all; you always want to have some chain left on the ship.正因为它是整条锚链的最后一环,一般根本受不到力,因为总有一部分链条还留在船上。But, if the anchor is still zooming down full speed at the point where the entire chain runs out, the abrupt jerk will cause that link to snap.但要是在整条锚链已完全抛出,锚还在急速下降,猛然的拉动还是会扯断弱环。Without the safety valve of the weak link, sailors might routinely drop more than their anchors.如果没有弱环作为安全阀,恐怕被抛入水底的就是那些水手了。 201412/351452。
  • Some of these kids though you mentioned they dont even know,I know there was a kid waiting outside你提到过 有些孩子甚至都不知道自己所处的情况 我知道有个孩子在外面流浪着didnt know where hes gonna sleep that night,They dont know where they are going不知道自己晚上会在哪里睡觉 他们不知道该去哪里Right, That happens fortunately not all the time, But we do have it and more than I wish we had是有这种情况 幸亏不多 但是的确存在 而且超乎我的想象And with this little boy had,a toothbrush and soda in his backpack这个小男孩随身携带的 背包里就一把牙刷和一瓶苏打水When I asked him where is his belongs he showed them,That was all.Thats all he had我问他都带了什么 他拿给我看 这就是所有 这就是他的全部家当When did you first realize the needyness,the true needyness of the situation你什么时候意识到这种需求 这种急需援助的形势The very first day I got there And I saw them eating the katchup or taking the packets for home第一天上班就意识到了 我看见孩子们在吃番茄酱 或者把番茄酱瓶带回家They do eat the Katchup a lot too but they were taking the packets home and the sporks他们肯定吃很多的番茄酱 但他们把番茄酱瓶和里面的小勺一起带回了家And I drove the neighborhood,As I was drive in the neighborhood,I kept thinking about I was raising the porjects我在这附近开车 开着车转悠的时候 我一直琢磨着要扩大我的计划Even I was raising the projects,I always had the sense of hope and things would be different即使我扩大了计划 我也一直抱有希望 认为情况会变得不一样I always knew it would be,My mother always still that tell us,There is hope and it will be better tomorrow我相信情况会变好 我妈妈总是教育我们 要抱有希望 明天会更好And I didnt know what these children felt And I was determined at that point to make sure they know there was hope我不知道这些孩子们怎么想 那是我决定让他们知道生活还有希望And things came across I started to servicing them一切就这么发生了 我开始帮助他们I think this is another thing that I heard that You noticed they would start to get the breast on Fridays or before a holiday Yes我听说了一件无关紧要的事 你注意到孩子们开始猛吃鸡胸脯 在周五或放假之前 没错because they probably would not eat till they came back school,Yes they get very anxious因为一直到下周返校之前可能都吃不到东西 是的 他们非常的担忧Its really bad time in holiday times or in summers.Its particularly bad on Fridays暑假或节日放假是他们的受难日 周五特别糟糕 /201605/446285。
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