火星

In order to understand engine vibration caused by malfunctions such as improper spark-plug gap, deposit, spark-plug wear, injector failure, unfit belt tension, loosening of spark-plug cable, misfire, this study employs time-frequency analysis which is based on Short Time Fourier Transform.

为了要了解引擎在常见之故障如火星塞的积碳、间隙变小与磨损、喷油嘴积碳卡住、皮带松动、火星塞高压线松动造成单缸失火等现象时引擎振动的变化，本文采用短时傅立叶转换之时-频分析。

Five years after the NASA rover Spirit landed on Mars, the six-wheeled robotic geologist and its twin Opportunity are still on the job.

自五年前美国宇航局精神号火星探测车登上火星，这个六轮的自动的地质探测师有机会一直在工作。

Since Spirit is just sitting in one place on Mars, that means you're actually tracking the location of that one spot on the Martian surface.

由于精神只是坐在一个在火星上进行，这意味着你实际上跟踪，关于火星表面的一个点的位置。

The Martian rover Opportunity found lots of mineral salt deposits on the bottom of the Meridiani Planum, just south of the planet's equator.

火星漫游器&机遇&号在 Meridiani Planum 的底部发现了许多矿物盐沉积物，Meridiani Planum 刚好在火星赤道以南。

Mars has no ozone layer to screen out the Sun's lethal radiation.

火星大气的构成中有95%是二氧化碳，而且，火星上没有能屏蔽太阳致命射线的臭氧层。

Mars have no ozone layer to screen out the Sun's lethal

火星大气的构成中有 95%是二氧化碳，而且，火星上没有能屏蔽太阳致命射线的臭氧层。

Comparison of the Thermospheres of Venus, Earth, and Mars at Equinox;Mars Thermosphere during the Seasons;Earth Thermosphere during the Seasons

金星、地球和火星在春分点时的热成层比较；火星热成层季节变化；地球热成层的季节变化

Without water, the dream of sending astronauts to the often dusty planet, which has rust-colored rocks and where the sky is red and sunset s are blue, couldn't unravel.

火星上尘土飞扬，岩石是铁锈色的，天空是红色的，日落是蓝色的。如果没有水，把宇航员送上火星的梦想就无法实现。

Without water, the dream of sending astronauts to the often dusty planet, which has rust-colored rocks and where the sky is red and sunsets are blue, couldn't unravel.

火星上尘土飞扬，岩石是铁锈色的，天空是红色的，日落是蓝色的。如果没有水，把宇航员送上火星的梦想就无法实现。

That's when cyclones sweep out from the poles, churning up the fine rust-colored dust on the surface and producing yellowish clouds that sometimes cover the entire planet.

当从极地刮来的台风吹遍火星表面的时候，搅起大量的细粉层，并生成黄色的云层，有时会覆盖整个火星。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。