The panthers move silently through the jungle.

黑豹在丛林中悄无声息地移动。

Cats are digitigrade animals, which allows them to move silently.

猫是趾行的动物，这使它们能够悄无声息地移动。

Cats move silently when they are hunting.

猫在猎食时动作不出声.

For the gentle wind does move Silently, invisibly.

因为那缕柔风飘来，听不到也看不见。