The animal retracted into its shell.

这只动物缩回到自己的壳里。

The undercarriage was fully retracted.

起落架被完全收起。

He made a false confession which he later retracted.

他作了假供词，后来又翻供。

Science retracted both papers.

科学篡改了这两篇论文。

The cat retracted his claws.

这只猫缩回它的爪子。