CNN News: 宇航員在太空中并不孤單

Two hundred forty-nine miles over our heads, astronauts on the International Space Station recently discovered they`re not alone. It`s not aliens, though. It`s bacteria -- specifically, Corynebacterium and Propionibacterium. Scientists think it just hitched a ride on space cargo to get to the station.

最近國際空間站的宇航員在我們上空249英里發(fā)現(xiàn)他們并不是孤零零的。但是陪著他們的不是外星人，是細(xì)菌啦——確切的來說，是棒狀桿菌屬和丙酸菌屬?？茖W(xué)家認(rèn)為這些細(xì)菌只是搭載太空貨物來到了空間站。

Many of us have encountered both of these bacteria. The first one causes respiratory infections. The second one, acne. But that`s on earth.

我們很多人都遇見過這些細(xì)菌。第一種細(xì)菌可以引起呼吸道感染，而第二種細(xì)菌可以引發(fā)粉刺。但是我們遇見這些細(xì)菌是在地球上。

Scientists think weightlessness could cause bacteria to behave differently.

科學(xué)家認(rèn)為失重可以導(dǎo)致細(xì)菌的行為有所不同。

And as NASA aims for longer, farther missions away, like one to Mars, they`re keeping close tabs on bacteria and astronauts health.

美國宇航局計(jì)劃時(shí)間更長、距離更遠(yuǎn)的任務(wù)，例如出發(fā)去火星，他們會密切關(guān)注這些細(xì)菌和宇航員的健康。

The International Space Station orbits the Earth every 90 minutes, traveling about 17,500 miles per hour.

國際空間站繞地球轉(zhuǎn)動一周的時(shí)間是90分鐘，同時(shí)速度為每小時(shí)17,500英里每小時(shí)。

But daily life in lower Earth orbit is hard work, and at times complicated. Even getting clean is a challenge. No shower here, instead, they use towels, wipes and a rinse-less shampoo.

但是在地球低軌道進(jìn)行日常生活是一件困難的事情，甚至有時(shí)候會非常復(fù)雜。甚至清理干凈是一項(xiàng)挑戰(zhàn)。在低軌道上不能洗澡、因此，宇航員使用毛巾擦洗，同時(shí)使用一種不同沖洗的洗發(fā)露。

On board this $100 billion research laboratory, there are never more than six crew members at a time. They stay for about six months, which can feel like an eternity living on pre-packaged food.

在太空艙的價(jià)值1000億美元的實(shí)驗(yàn)室里，乘務(wù)人員從沒有一次超過6人。他們在那里呆半年，就像永遠(yuǎn)生活在預(yù)先包裝好的食物里。

There are no refrigerators in space, and salt and pepper only in liquid form, otherwise the particles would be airborne, clogging air vents or getting in an astronaut`s eye. Peanut butter on a specially packaged tortilla is a space station staple.

在太空里沒有冰箱，同時(shí)只有液態(tài)的鹽和辣椒，否則的話這些顆粒將會隨空氣漂浮，這樣就會堵塞通風(fēng)口、并進(jìn)入宇航員的的眼睛。經(jīng)過特殊包裝的花生醬是空間站上的主要產(chǎn)品。

A weightless tortilla. OK. We got one tortilla. Wow, it got away.

一個(gè)失重的玉米餅。好的，我們拿到了一個(gè)玉米餅。天呀，它又飄走了。

Most of the day is spent working on science experiments that only a micro-gravity environment can provide.

一天的大部分時(shí)間都會花在科學(xué)實(shí)驗(yàn)上，而這是實(shí)驗(yàn)只有在微重力的條件下可以做。

There are also medical experiments, which can judge how well their bodies adjust to life in space for long periods of time.

同時(shí)還有醫(yī)學(xué)實(shí)驗(yàn)，這些醫(yī)學(xué)實(shí)驗(yàn)可以判斷人體在太空長時(shí)間的適應(yīng)程度。

And while you may be weightless in space, exercise is a must using equipment you won`t find on Earth, like this treadmill.

盡管你在太空中是失重的，鍛煉是必須的，需要使用在地球上找不到的設(shè)備，例如這種特殊的跑步機(jī)。

Sleeping is easier, as long as the astronauts remember to tie down their sleeping bags.

睡覺是一件比較容易的事情，只要宇航員記得要躺在自己的睡袋里面哦~