我一直在收拾行李，准备出发。

I've been packing up, ready to go.

youdao

这还是真的需要些胆量才行的，飞机在白天电池充电时会一直爬高，而到了晚上为了节省电力会一直不断地缓慢下降。

This will involve some daring, with the aircraft spending all day climbing as its batteries are recharged and then descending slowly under power throughout the night to conserve energy.

youdao

低温气体和尘埃长长的卷须从渐行渐远的电离前沿一直延伸到数光年远的太空。

A long tendril of colder gas and dust extends many light years into the void from the receding ionization front.

youdao