His father is twice double as old as he (is).

他爸爸的年龄是他的两倍。

Tip: An elegant watch can double as jewelry.

小贴士：精致的手表比首饰更出众。

The new styled school - bag can double as a stool.

这种新式书包可兼做凳子.

This can also double as a strong magnet if you require one.

如果需要的话，也可以用作磁铁。

This sofa can double as a bed for guests staying overnight.

沙发为留下来过夜的客人当作床。

Today libraries double as centers for the elderly and toddler playrooms.

今天图书馆有双重功能――老人的娱乐室和孩子们的游戏室。

Handbags with detachable straps can double as clutches for the evening.

提带可拆卸的手包也能为你的晚间活动添彩.

At this point you also double as both - consumers and art appreciation.

此时的你也身兼兼“两职”——消费者和艺术欣赏者。

When we have guests, the sofa in the living room can double as an extra bed.

家里来客人的时候, 客厅里的沙发还可以兼作床用.

They double as a possible means of detecting intelligent life in the universe.

它们同时也可能成为探测宇宙中智慧生命的方法。