For my return journey, I felt I could afford the extra and travel first class

She always travels first-class regardless of expense.

无论费用多高她总是乘头等舱。

The only guarantee of having a cabin to oneself is by travelling first class

只有坐头等舱旅行才能保证一个人独享一舱。

The economy is the number one issue by far

到目前为止，经济是头等大事。

The first-class compartment is situated at the front of the train.

头等车厢位于火车的前部。

Voters continue to rate education high on their list of priorities.

选民继续把教育看作是头等重要的大事。

First prize will be a meal for two at the restaurant of your choice.

头等奖是一顿两人正餐，餐馆任选。

We'll fly first class on a Boeing 757 from New York to Paris.

我们将乘坐波音757的头等舱从纽约飞往巴黎。

Study is the matter of primarily importance.

学习是头等重要的事。

They are entitled to first class travel

他们可以坐头等舱旅行。

Air France first-class seats recline almost like beds

法国航空公司头等舱的坐椅可以调低成几乎像床一样。

Being a parent is her first priority

做好母亲是她的头等大事。

X-band ir-mss data transmission antenna used on CBERS-1 satellite

资源一号卫星X波段IR-MSS数传天线

The Tianwen 1 mission has left the nation's first mark on the Red Planet and is another landmark, China is now among the leading countries in planetary exploration.

天问一号探测器着陆火星，在火星上首次留下中国人的印迹，这是我国航天事业发展的又一具有里程碑意义的进展。

The spacecraft, launched on July 23, 2020, is expected to enter the Mars orbit around February.

天问一号于2020年7月23日发射，有望在2月份左右进入火星轨道。

Joint Orbit Determination for TC-1 Satellite with USB and VLBI

USB与VLBI联合确定探测一号卫星轨道

Data Acquisition System of the Payload X-ray Spectrometer of CE-1 Lunar Satellite

嫦娥一号卫星X射线谱仪数据采集系统

Breakfast number one-Apples and Almond Butter.

早餐一号，苹果和杏仁酱。

Retrofit of the DCS for Unit 1 of Zhujiang Power Plant

珠江电厂一号机组DCS的改造

An Estimate of Transformation Coefficients for The V Magnitude of No.1 CCD System at Yunnan Observatory

对云台一号CCD系统V星等归化系数的估计

China's Tianwen-1 mission was launched on July 23, 2020, the first step in China's adventure in planetary exploration.

2020年7月23日，“天问一号”任务成功发射，迈出中国行星探测的第一步。