Today, for an unmanned ship to reach Mars, it takes almost a year.

今天，一艘无人飞船要到达火星，需要将近一年的时间。

This comes with a checkpoint, sometimes manned, sometimes unmanned in a simple drive-through.

这带有一个检查站， 有时有人值守， 有时无人值守， 只是简单的驾车通过。

The unmanned spacecraft aimed to be the first to land on the moon's south pole.

这艘无人飞船的目标是成为第一个登陆月球南极的航天。

The explosion was so tremendous because the unmanned vehicle was carrying enough fuel to get it to the International Space Station.

爆炸非常壮观，因为这艘无人火箭搭载着飞到国际空间站大量的燃料。

Last December China made headline with an unmanned lander and robotic rover generally touched down on the moon and drove around.

去年12月，国的无人驾驶着陆和月球车登陆月球并四处巡视，这使国成为焦点。

Smaller, cheaper and, where possible, unmanned systems could be procured in larger numbers, dispersed more widely and used more daringly.

更小、成本更低，而且在可能的情况下，无人驾驶系统可以被大量采购、更广泛地分散和更大胆地使用。

The Soviet Union holds an early lead in the space race, launching the first unmanned satellite to orbit the Earth.

航天竞赛苏联领先一了第一颗绕地无人卫星。

Elon Musk's Space X aims to send an unmanned aircraft to Mars by 2018.

Elon Musk的太空X计划在2018年一个无人飞行到火星。

Their unmanned privately funded spacecraft was supposed to make a soft controlled landing there but communication was lost when it was about 500 feet away from the moon's surface, and it was traveling toward it at 310 miles per hour.

他们的无人驾驶私人资助的宇宙飞船本应在那里进行软控着陆，但当它距离月球表面约500英尺时失去了联系，并以每小时310英里的速度飞向月球。

On Wednesday it will launch a mission called DART, the Double Asteroid Redirection Test, that will send an unmanned spacecraft into space and if successful it won't be returning home.

周三，美国宇航局将一项名为DART的任务，即双小行星重定向测试，该任务将一艘无人航天送入太空，如果成功，它将不会返回地球。

From those torpedo tubes, you can also launch unmanned underwater vehicles, drones, becoming more of a focus in this Navy, and some submarines like this equipped to send out SEAL team delivery vehicles as well.

从鱼雷管，你还可以无人水下飞行，无人机，越来越多的关注于这个海军，以及一些潜艇，比如这个装备，也可以派出海豹突击队的运载工具。

We're talking about an unmanned aerial vehicle, a small plane that flies without a pilot to an airport in one of the Orkney Islands where a human postal worker would then get its cargo and deliver it to houses.

而是无人驾驶飞行，它是一种小型飞机，可以在没有飞行员的情况下飞到奥克尼群岛的一个机场，到了那里再由邮递员取货然后送货上门。

Two unmanned spacecrafts were launched as part of the Voyager missions in 1977.

1977年，两个无人驾驶飞船作为“航行者”号任务的一部分。

Two unmanned spacecraft were launched as part of the Voyager missions in 1977.

1977年，两艘无人驾驶飞船作为“旅行者”号任务的一部分。

Some say that unmanned balloons that were filled with bombs and put in combat in the mid-1800s were the first types of drones.

有人说，在19世纪期，装有炸弹并投入战斗的无人驾驶气球是第一种类型的无人机。

The U.S. drone and two Russian aircraft were flying over the Black Sea when one of the Russian jets intentionally flew in front of and dumped fuel on the unmanned American drone several times.

这架美国无人驾驶飞机和两架俄罗斯飞机在黑海上空飞行时，其一架俄罗斯飞机有意飞至美国无人驾驶飞机前方，并多次向其倾倒燃料。

However, in the mid-2000s the USS Jimmy Carter was modified to support clandestine operations, adding an extra one hundred foot section of hull to support the launching and recovery of unmanned vehicles and up to 50 SEALS.

然而，2005年前后吉米卡特号潜艇被改装以支持秘密行动，艇体额外扩充了一百英尺，以支持无人驾驶装置和多达50个鱼雷的和回收。

President Trump said he had called off the planned strikes because the loss of lives would have been disproportionate compared with the shooting down of an unmanned drone by Iran.

特朗普表示自己取消计划好了的袭击是因为伊朗击落一架无人机在损失的生命面前不值一提。

An unmanned vehicle found a creature, but not the one it was looking for.

一辆无人驾驶汽车探测到一个生物，但不是原本计划要搜寻的目标。

He says the goal behind unmanned vessels like the Maxlimer is to keep humans safe.

他说，像Maxlimer这样的无人驾驶船只，它们的目标是保护人类的安全。