The desk has a secret compartment.

这书桌有一个暗格。

《牛津词典》

After closer inspection, you find than there is a secret compartment in the back.

经过仔细检查，你在后面找到一个小的秘密夹层。

youdao

The prototype was a success and de Oliveira Barata's clients now range from ex-military men looking for a sci-fi leg to children wanting a secret compartment to store their pencils.

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