在短短两小时内，溪流的水位可以上升十到二十英尺。
不到一个小时，马尔琴科和他的团队就看到了大约13英尺高的海浪。
Within an hour, Marchenko and his team saw a wave that was about 13 feet high.
在测试中，喷气设备可以60英里每小时的速度飞行30英里，通过一个气体引擎和两个管道风扇，可以上升到7,800英尺的高度。
In testing, the Jetpack could travel at 60 miles per hour for up to 30 miles, and as high as 7,800 feet using a gas engine and two ducted fans.
在测试中，喷气设备可以60英里每小时的速度飞行30英里，通过一个气体引擎和两个管道风扇，可以上升到7,800英尺的高度。
In testing, the Jetpack could travel at 60 miles per hour for up to 30 miles, and as high as 7, 800 feet using a gas engine and two ducted fans.
“现在，每两个小时，他就会把车倒后几英尺，然后再向前开几英尺，这样就可以开始重新计时了，”科尔曼说。
'Now, every two hours, he backs his car up a few feet and forward a few feet and the time starts over,' Mr. Coleman says.
气球将会花费几个小时升到大约36千米的巡航高度，那里行船直径将达到129米【423英尺】。
The balloon will spend a few hours rising to a cruising altitude of around 36 km, where the sail will be 129 meters [423 feet] in diameter.
自行车车道离机动车道仅有几英尺，机动车规定速度必须保持在每小时30英里，这是在西雅图干道上的速度限制，但实际上许多车辆都是以每小时40英里的速度行驶的。
A few feet from the cycling lane traffic moves at speeds of between 30 miles per hour, the speed limit for arterials in Seattle, and 40 miles per hour, the speed at which many cars actually travel.
每日超同一块太空垃圾发射数小时的激光，这有可能使其发生650英尺的位移。
By firing a laser at a piece of junk for a few hours it should be possible to alter it's course by 650ft per day.
纽约旗舰店24小时营业，是一个32英尺长的玻璃立方体，非常与众不同。
That one, open 24 hours a day, is a distinctive 32-foot glass cube.
几乎有12米(40英尺)高，苏的“宇宙机器”据说每24小时只慢几分钟。
Standing almost 12 metres (40 feet) tall, Su's "Cosmic Engine" wavered, it is said, by only a few minutes in every 24 hours.
拥有115英寸长翼展的全球鹰能够在六万英尺的高空(也就是距离地面18公里)连续执行36小时侦察行动。
The Global Hawk, with a 115-foot wingspan, is capable of conducting surveillance for 36 hours at a stretch at altitudes of up to 60,000 feet (18 kilometers).
一个月前，我们接受了一次同样令人警醒的教训。7月26号，孟买24小时的降水量达到了994毫米(超过3英尺)。
An equally sobering lesson, though, had come just a month earlier, on July 26th, when 994mm (over three feet) of rain had fallen in 24 hours on Mumbai.
赫斯勒描述三个人合作设计一座厂房：“了解了所有的细节后，他们只花了一个小时零四分钟便画好了占地面积为两万一千平方英尺的厂房设计图。”
Hessler describes three men designing a new factory: "All told, they had mapped out a 21, 000-square-foot factory, from bottom to top, in one hour and four minutes."
你小时候，这个公园一直有一片12英尺的栅栏围着，是吗？
Was there a twelve foot fence around this park when you were growing up?
飞机的飞行高度在35000英尺，时速是每小时521英里，空军报道说。
The jet was flying at an altitude of 35, 000 feet and a speed of 521 MPH, the air force said.
“阿尔文”号潜艇：尺寸：长24英尺，宽9英尺，高12英尺；重量：20顿；操作时间：10.5小时；人员：1名驾驶员，2名研究者；最大深度：21，000英尺（2015年）上升速度：157英尺/分
Alvin: Size:24 ft. long, 9 ft wide, 12 ft. high (est.) Weight: 20 Tons Operating Time
次日我们到55英尺以下的海床上去行走，几小时前我们就在这平静如镜的海面上荡浆。
Next day we walked the seabed 55ft below where, hours earlier, we had rippled the mirror-like sea with our paddles.
在竹子的近七百个品种中，有的全长成还不到一英尺，有的却能在二十四小时内长出三英尺。
Among almost sevenhundred species of bamboo, some are fully grown at less than a foothigh, while others can grow three feet in twenty-four hours.
从地面上看到空间站其实不是很“困难”--它大概300多英尺长，但是它的移动速度实在是非常的快，（差不多每小时17,000英里）。
The ISS isn’t so hard to see from the ground--it’s well more than 300 feet long these days--but it is moving really, really quickly (like 17, 000 miles per hour quickly).
声明称，伊夫罗西的飞行最高时速为每小时190英里（合每小时304公里），飞行高度为峡谷上方200英尺（合65米）。
He flew at speeds of up to 190 mph (304 kilometers an hour), skimming the rockscape just 200 feet (65 meters) above the rim of the canyon, the statement said.
我小时候总是走着去上学，脚下是六英尺厚的雪，来回都是上坡路！
When I was kid I used to walk to school through six feet of snow, uphill, both ways!
当它们听到你开动剪草机准备除草时，它们就会前来攻击你，将你追出1000英尺远，它们还能够持续攻击长大10个小时。
Whenever they hear you coming with a lawnmower or trimmer, they will attack you and they will chasing after you as far as 1000 feet and they can continue attacking you for up to 10 hours.
这是300，英尺/小时，并不是很可行的。
This would be the 300 miles per hour, which, of course, is not very doable.
想一想当你在飞机上时，你实际上是在三万英尺的高空，呆在一个铝管里，以每小时600里的速度飞行，而你觉得这一切都还好。
Think about flying in an airplane. You're up there in an aluminum tube, 30, 000 feet up, going 600 miles an hour, and you think everything is all right.
在竹子的近七百个品种中，有的全长成还不到一英尺，有的却能在二十四小时内长出三英尺。
Among almost sevenhundred species of bamboo, some are fully grown at less than a foothigh, while others can grow three feet in twenty-four hours。
罗伯特穿着红色防雨外套、紧身衣裤和攀登鞋，借助办公大楼侧面垂下来的绳索爬上了1667英尺高、101层的大楼，历时约四小时。
Robert, dressed in a red rain jacket, tights and climbing shoes, shimmied up ropes hung down the sides of the 101-story, 1,667-foot office tower, reaching the top in around four hours.
罗伯特穿着红色防雨外套、紧身衣裤和攀登鞋，借助办公大楼侧面垂下来的绳索爬上了1667英尺高、101层的大楼，历时约四小时。
Robert, dressed in a red rain jacket, tights and climbing shoes, shimmied up ropes hung down the sides of the 101-story, 1,667-foot office tower, reaching the top in around four hours.
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