Best practice: To save space in the analysis database, you should delete the output tables from older runs when they are no longer needed.

最佳实践：为节省分析数据库的空间，应当从旧有运行中删除不需要的输出表。

youdao

Astronauts needed a way to cleanse water they take up into space, since bacteria and sickness would be highly problematic.

宇航员需要一种能够将水进行净化是手段，从而防止细菌和污物带来的高风险。

youdao

Only their special space clothing would provide the air pressure they needed to stay alive.

只有特制的太空衣才能提供给他们生存所必须的大气压。

youdao

Only their special space clothing would provide the air pressure they needed to stay alive.

VOA: special.2009.06.24

Chaplin says it was important they took as long as they needed and made sure they were all in "the right space mentally".

BBC: Keane overcome rows and mistakes to release Strangeland

Kennedy's summons to space only needed to jolt a few thousand scientists into doing something they did not know they could do.

ECONOMIST: Lexington

The weight of the lunar module, on top of the command and service module, was the main reason why the Saturn V rockets that shot Apollo astronauts into space needed to be the tallest, heaviest and most powerful ever flown, a record they still hold.

ECONOMIST: Space lifts