Unlike high altitude aircraft, helicopters aren't so vulnerable to being seen by radar, as they fly low and are often hidden by the terrain. The big issue is the sound.
与在高空飞行的飞机不同，直升机不容易被雷达发现，因为它的飞行高度较低，且常常被地形所隐藏，因此最大的问题是噪音。
French officials said bad weather made the search difficult, with heavy clouds forcing planes to fly very low over the water and limiting their line of sight.
法国官方指出，恶劣的天气使搜索工作变得困难，多云天气迫使搜救飞机飞得很低，同时也影响了视线。
"You don't need much space, and you can have a flexible flight plan," he said. "Say your home is a few kilometers from the golf course - you just hop in your helicopter, fly low, and go there."
“你不需要很大的空间，你可以有弹性的飞行计划”，他说，“如果你家离高尔夫球场有几公里——你只需登上直升机，低空飞行，然后就到了，很难被发现”。
“You don’t need much space, and you can have a flexible flight plan,” he said. “Say your home is a few kilometers from the golf course — you just hop in your helicopter, fly low, and go there.
“你不需要很大的空间，你可以有弹性的飞行计划” ，他说，“如果你家离高尔夫球场有几公里——你只需登上直升机，低空飞行，然后就到了，很难被发现”。
"They fly low over the water and catch surface-feeding fish, such as the mosquitofish, with their claws," Aihartza said.
“它们会低飞到水面，然后用它们的爪子抓取表层鱼类，例如食蚊鱼，”Aihartza说。
He would fly low, intentionally backfiring the plane and frightening away the hunters.
他会飞得很低，故意让飞机尾部喷火，吓跑猎手。
Frost heavy on distant peaks and maples red like drunken; Winds strong over the river in the sky and passing geese fly low.
霜重远岭丹枫醉﹐风急江天过雁低。
Their digital elevation model will have myriad USES, from helping military jets fly ultra low to showing relief workers where an earthquake's damage is worst.
建立这些数字高程模型，有无数的用途，可以帮助军用飞机超低飞行，可以给救济工作人员显示地震的哪里破坏最大。
AS someone who used to have to fly for business all the time, she knows what low cost airlines have done to empower travellers in ASEAN.
作为一个已经习惯搭飞机出差的人而言，她知道廉价航空公司带给东盟国家旅客的是什么。
The low cost airlines serve a segment of people who want to fly but can’t afford to.
廉价航空公司的服务对象是想坐飞机但是买不起飞机票的人群。
If the temperature dropped to 60 degrees below zero, we could not fly, but there were not that many days that the temperature was that low.
如果气温下降到零下60度以后，我们就停止飞行，但是没有多少天会那么冷。
But generating such a large amount of VXML on the fly is probably impractical, whereas running a script to generate the specification information on the fly is comparatively low volume.
但是，动态地生成如此大量的VXML可能不太现实，所以用脚本动态生成的信息量一般比较少。
A short take-off and landing (STOL) aircraft must be able to fly at low controlled speeds, yet it must also offer acceptable cross-country (cruise) performance.
一个简短的起飞和着陆(短距起降)飞机必须能够控制飞行速度低，但它也必须接受上述报价越野(巡航)的性能。
True friendship, won't let you low to the dust, but will let you fly.
真正的友谊，不会让你低到尘埃，而是会让你展翅飞翔。
A no-fly zone can be imposed in a matter of hours, likely with low military risk, as NATO demonstrated over Bosnia in the mid-1990s and as a coalition did over Iraq after 1991.
设置禁飞区可以在几小时之内被强制完成，看起来像是没有很高的军事风险，正如北约在20世纪90年代中期在波斯尼亚以及在1991年后其作为一个联盟在伊拉克所表现的那样。
In addition, in 2009 the space station increased its capacity from three crew members to six, increasing demand to fly to low Earth orbit.
另外，2009年国际空间站机组成员由3人提升6人，大大增加了当时的近地轨道飞行运力需求。
As it gears up to fly its 100th million passenger by the third quarter this year, Asia's first low cost airline, AirAsia, is working on how to turn price-sensitive customers into loyal ones.
亚洲第一家廉价航空公司亚洲航空(airasia，以下简称亚航)将在今年第三季度迎来其第一亿名乘客，目前他们正在努力地把对价格敏感的乘客转化为忠诚的乘客。
As it gears up to fly its 100 millionth passenger by the third quarter this year, Asia's first low cost airline, AirAsia, is working on how to turn price-sensitive customers into loyal ones.
亚洲第一家廉价航空公司亚洲航空(airasia，以下简称亚航)将在今年第三季度迎来其第一亿名乘客，目前他们正在努力地把对价格敏感的乘客转化为忠诚的乘客。
I see, you can fly a little bit low, close to me, we good good Lao Lao.
我看，你们可以飞得低一些，靠近我，咱们好好唠唠。
I asked him to fly low over the beach.
我让他在海滩上方低飞。
NASA says astronauts would not fly onboard until at least 2016. NASA has not flown astronauts beyond low-Earth orbit since the Apollo program, in the 1970s.
美国宇航局说，宇航员最早将于2016开始太空飞行。美国航空航天局自20世纪70年代的“阿波罗计划”以来，就没有进行过超出地球低轨道的载人航空活动。
This new shear has simple structure, reasonable stress, high rigidity, long service life and convenient maintenance compared with low shaft floatation disc fly shear.
与下轴浮动式圆盘飞剪相比，该新型剪机的结构简单，受力合理，刚度及剪刃寿命提高，且维修方便。
We can only fly low shade of a tree stand.
我们只能站在树阴低下飞。
When weather became bad, the insect depended ground flight more, the barn swallow wanted to eat an insect, so low fly.
天气转坏时，昆虫多靠地面飞行，燕子想吃昆虫，所以低飞。
Before they can prosper, the big six must first cut regional and transcontinental capacity, while they focus on potentially more profitable long-haul routes, which low-cost carriers do not fly.
在他们能够繁荣之前，六大航空公司必须先削减地区和洲际席位，将精力集中于潜在利润更高的远程航线，这些线路低成本航空公司是不会飞的。
For instance, when She saw a moth fly into a halogen working light and die, She immediately changed all the outdoor lights to low-heat-emitting bulbs.
比方说有一次，师父看到一只蛾飞进一盏卤素灯里往生了，她立刻将户外的灯全都换成低热度的电灯泡。
For instance, when She saw a moth fly into a halogen working light and die, She immediately changed all the outdoor lights to low-heat-emitting bulbs.
比方说有一次，师父看到一只蛾飞进一盏卤素灯里往生了，她立刻将户外的灯全都换成低热度的电灯泡。
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