1. They left under (the) cloak of darkness.
    他们在黑暗的遮掩下离开了.

2. They looked in the folds of her dress, in the folds of her cloak, in the pockets, everywhere.
    他们在礼服的折叠处，在斗篷的缝隙中，在衣兜里，四处都找遍了。

3. He was stabbed with a dagger.
    他被匕首刺了。

4. Apart from an interesting-looking carved dagger, the box was full of crockery, much of it broken.
    除了一柄式样别致、雕有花纹的匕首外，货箱内装满陶器，而且大部分都已破碎裂。