Mother keeps her jewellry in a small locked box.

母亲把首饰放在一个锁着的小盒子里。

youdao

I'm puzzled about the fact that the magician escaped from the locked box with both hands tied behind his back.

我搞不懂那个魔术师是怎样在双手被反缚的情况下从那个锁着的箱子里逃脱的。

youdao

Escape artists perform their stunts by breaking free from something, such as a locked box, chains and handcuffs, or a closed tank that is filled with water.

脱逃术艺人透过挣脱某物的禁锢来展现他们的特技，这些物品包括上锁的箱子、锁炼及手铐、亦或是装满水的密闭水缸。

youdao

By putting Social Security into a locked box and declaring it sacrosanct, the budget deal may inadvertently make reform harder.

ECONOMIST: Budget making

My parents, brothers and other relatives are stumbling around, trying to stuff my words, anecdotes and remembrances of the past back into the locked Chinese box.

CNN: Tiger moms: Don't turn your kids into robots

At home--even in the suburbs--have a locked mail box.

FORBES: Seven Ways To Foil ID Thieves