Joe's lips moved soundlessly.

乔的嘴唇无声地动着。

You're flying soundlessly near me.

你在我附近无息飞起；

Frightened, he sits there soundlessly.

很害怕，他静悄悄的坐在那里。

It was Juana arising, almost soundlessly.

是胡安娜起身了，几乎没有声音。

He walks slowly and soundlessly like a leopard.

豹子一样缓慢无声地走着。