The first launch of Falcon 9 could change the course of human space flight.

猎鹰9号的首次发射可能会改变人类太空飞行的进程。

youdao

But why spend money on human space flight at all?

但是，归根结底，为什么要花钱在载人航天飞行上呢？

youdao

The astronauts aboard the shuttle were smart and accomplished people, and they were deeply committed to human space flight and exploration.

航天飞机中的宇航员们都是聪颖而有所建树的人，他们全心全意致力于人类的太空飞行和探索。

youdao

Most of the money will go towards working with industry on new technologies to make human space flight safer.

VOA: standard.2010.04.15

"China is only the third country to have human space flight capabilities.

VOA: standard.2010.04.21

"The United States spends on human space flight.

VOA: standard.2010.04.21

The UN marked April 12 as the first annual International Day of Human Space Flight.

FORBES: Will Russia Win the Next Space Race?

Second, the success of all human space flight programs is intimately tied to the success of Station.

WHITEHOUSE: Jacob J. Lew Testimony to House Science Committee, 08/06/1998 | The White House

In seeking to accommodate Station cost growth within human space flight, we will not compromise Space Shuttle safety.

WHITEHOUSE: Jacob J. Lew Testimony to House Science Committee, 08/06/1998 | The White House