Zanzibar and Nairobi are now four weeks old and eating worms.

桑给巴尔和奈洛比(两只小沼狸的名字)现在四周大并且开始吃虫子了。

youdao

These homing pigeons begin their training when they are about four weeks old.

信鸽在出生大约满4周时就进行训练。

youdao

They were only about four weeks old, and had beautiful gray-striped bodies and large, frightened eyes.

它们只有大约4周大，一身漂亮的灰条纹，大眼睛惊恐不安。

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The court heard that some of these fractures were up to four weeks old, while others had possibly been sustained within ten days of her death.

BBC: Barry McCarney

He carried out a post-mortem examination of seven of Millie's ribs which he said showed no evidence of disease, adding that fractures to them were about four weeks old.

BBC: Barry McCarney

The Scottish full-back will be out for up to eight weeks but Jones hopes that 26-year-old McNaughton will be back within three to four weeks.

BBC: Injury concern for Cardiff trio