The plane took off and ascended steadily until it was out of sight.

飞机起飞之后平稳地升空直到失在视野之外。

His passion was slowly draining from him.

他的热情失了。

The sound of their footsteps died away.

他们的脚步声失了。

As I got about, the stiffness in my left leg gradually worked off.

四处走动, 左僵硬的情况失了。

The organization tapered off in about half a year.

那个组织大约半年内就失了。

The rumble of thunder died off.

隆隆雷声失。

The coastline faded into darkness.

海岸线在黑暗中失了。

The sounds fainted away.

声音失了。

The distant cry trailed off.

远处传来的喊声地失了。